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Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving,...
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Transcript of Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving,...
![Page 1: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/1.jpg)
EstimationEstimationGLE 050612 Apply and adapt a variety of appropriate strategies to problem solving including estimation and reasonableness of the solution 1048633 050613 Explore different methods of estimation including rounding and truncating
VocabularyVocabulary
Digits ndash a number symbol used to make Digits ndash a number symbol used to make numbers (0 1 2 3 4 5 6 7 8 9)numbers (0 1 2 3 4 5 6 7 8 9)
Numbers ndash Made up of any combination of Numbers ndash Made up of any combination of digitsdigits
Place Value - The value of a digit based on its Place Value - The value of a digit based on its position in a number position in a number
Truncating - To shorten (a number) by dropping one or more digits after the decimal point
Whole Number ndash any positive number that Whole Number ndash any positive number that does not have a fractional or decimal partdoes not have a fractional or decimal part
Place ValuePlace Value
RoundingRounding
In order to estimate an In order to estimate an answer we round the numbers answer we round the numbers in the problem to solvein the problem to solve
Look at each digit in the Look at each digit in the number number
Determine which place value Determine which place value the digit to be rounded is inthe digit to be rounded is in
RoundingRounding
If the digit following that If the digit following that number is five or more number is five or more round upround up
If the digit following that If the digit following that number is four or less number is four or less round downround down
PracticePractice
Round to the nearest hundredRound to the nearest hundred234234
ndash Since 2 is in the hundreds place I Since 2 is in the hundreds place I need to look at the 3 to need to look at the 3 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since three is less than 5 I Since three is less than 5 I should round downshould round down
ndash 200 is the correct answer200 is the correct answer
PracticePractice
Round to the nearest hundredRound to the nearest hundred769769
ndash Since 7 is in the hundreds place I Since 7 is in the hundreds place I need to look at the 6 to need to look at the 6 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 6 is greater than 5 I Since 6 is greater than 5 I should round up should round up
ndash The correct answer is 800The correct answer is 800
PracticePractice
Round to the nearest hundredRound to the nearest hundred457457
ndash Since 4 is in the hundreds place I Since 4 is in the hundreds place I need to look at the 5 to need to look at the 5 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 5 is equal to 5 I should Since 5 is equal to 5 I should round up round up
ndash 500 is the correct answer500 is the correct answer
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 2: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/2.jpg)
VocabularyVocabulary
Digits ndash a number symbol used to make Digits ndash a number symbol used to make numbers (0 1 2 3 4 5 6 7 8 9)numbers (0 1 2 3 4 5 6 7 8 9)
Numbers ndash Made up of any combination of Numbers ndash Made up of any combination of digitsdigits
Place Value - The value of a digit based on its Place Value - The value of a digit based on its position in a number position in a number
Truncating - To shorten (a number) by dropping one or more digits after the decimal point
Whole Number ndash any positive number that Whole Number ndash any positive number that does not have a fractional or decimal partdoes not have a fractional or decimal part
Place ValuePlace Value
RoundingRounding
In order to estimate an In order to estimate an answer we round the numbers answer we round the numbers in the problem to solvein the problem to solve
Look at each digit in the Look at each digit in the number number
Determine which place value Determine which place value the digit to be rounded is inthe digit to be rounded is in
RoundingRounding
If the digit following that If the digit following that number is five or more number is five or more round upround up
If the digit following that If the digit following that number is four or less number is four or less round downround down
PracticePractice
Round to the nearest hundredRound to the nearest hundred234234
ndash Since 2 is in the hundreds place I Since 2 is in the hundreds place I need to look at the 3 to need to look at the 3 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since three is less than 5 I Since three is less than 5 I should round downshould round down
ndash 200 is the correct answer200 is the correct answer
PracticePractice
Round to the nearest hundredRound to the nearest hundred769769
ndash Since 7 is in the hundreds place I Since 7 is in the hundreds place I need to look at the 6 to need to look at the 6 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 6 is greater than 5 I Since 6 is greater than 5 I should round up should round up
ndash The correct answer is 800The correct answer is 800
PracticePractice
Round to the nearest hundredRound to the nearest hundred457457
ndash Since 4 is in the hundreds place I Since 4 is in the hundreds place I need to look at the 5 to need to look at the 5 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 5 is equal to 5 I should Since 5 is equal to 5 I should round up round up
ndash 500 is the correct answer500 is the correct answer
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 3: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/3.jpg)
Place ValuePlace Value
RoundingRounding
In order to estimate an In order to estimate an answer we round the numbers answer we round the numbers in the problem to solvein the problem to solve
Look at each digit in the Look at each digit in the number number
Determine which place value Determine which place value the digit to be rounded is inthe digit to be rounded is in
RoundingRounding
If the digit following that If the digit following that number is five or more number is five or more round upround up
If the digit following that If the digit following that number is four or less number is four or less round downround down
PracticePractice
Round to the nearest hundredRound to the nearest hundred234234
ndash Since 2 is in the hundreds place I Since 2 is in the hundreds place I need to look at the 3 to need to look at the 3 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since three is less than 5 I Since three is less than 5 I should round downshould round down
ndash 200 is the correct answer200 is the correct answer
PracticePractice
Round to the nearest hundredRound to the nearest hundred769769
ndash Since 7 is in the hundreds place I Since 7 is in the hundreds place I need to look at the 6 to need to look at the 6 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 6 is greater than 5 I Since 6 is greater than 5 I should round up should round up
ndash The correct answer is 800The correct answer is 800
PracticePractice
Round to the nearest hundredRound to the nearest hundred457457
ndash Since 4 is in the hundreds place I Since 4 is in the hundreds place I need to look at the 5 to need to look at the 5 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 5 is equal to 5 I should Since 5 is equal to 5 I should round up round up
ndash 500 is the correct answer500 is the correct answer
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 4: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/4.jpg)
RoundingRounding
In order to estimate an In order to estimate an answer we round the numbers answer we round the numbers in the problem to solvein the problem to solve
Look at each digit in the Look at each digit in the number number
Determine which place value Determine which place value the digit to be rounded is inthe digit to be rounded is in
RoundingRounding
If the digit following that If the digit following that number is five or more number is five or more round upround up
If the digit following that If the digit following that number is four or less number is four or less round downround down
PracticePractice
Round to the nearest hundredRound to the nearest hundred234234
ndash Since 2 is in the hundreds place I Since 2 is in the hundreds place I need to look at the 3 to need to look at the 3 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since three is less than 5 I Since three is less than 5 I should round downshould round down
ndash 200 is the correct answer200 is the correct answer
PracticePractice
Round to the nearest hundredRound to the nearest hundred769769
ndash Since 7 is in the hundreds place I Since 7 is in the hundreds place I need to look at the 6 to need to look at the 6 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 6 is greater than 5 I Since 6 is greater than 5 I should round up should round up
ndash The correct answer is 800The correct answer is 800
PracticePractice
Round to the nearest hundredRound to the nearest hundred457457
ndash Since 4 is in the hundreds place I Since 4 is in the hundreds place I need to look at the 5 to need to look at the 5 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 5 is equal to 5 I should Since 5 is equal to 5 I should round up round up
ndash 500 is the correct answer500 is the correct answer
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 5: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/5.jpg)
RoundingRounding
If the digit following that If the digit following that number is five or more number is five or more round upround up
If the digit following that If the digit following that number is four or less number is four or less round downround down
PracticePractice
Round to the nearest hundredRound to the nearest hundred234234
ndash Since 2 is in the hundreds place I Since 2 is in the hundreds place I need to look at the 3 to need to look at the 3 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since three is less than 5 I Since three is less than 5 I should round downshould round down
ndash 200 is the correct answer200 is the correct answer
PracticePractice
Round to the nearest hundredRound to the nearest hundred769769
ndash Since 7 is in the hundreds place I Since 7 is in the hundreds place I need to look at the 6 to need to look at the 6 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 6 is greater than 5 I Since 6 is greater than 5 I should round up should round up
ndash The correct answer is 800The correct answer is 800
PracticePractice
Round to the nearest hundredRound to the nearest hundred457457
ndash Since 4 is in the hundreds place I Since 4 is in the hundreds place I need to look at the 5 to need to look at the 5 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 5 is equal to 5 I should Since 5 is equal to 5 I should round up round up
ndash 500 is the correct answer500 is the correct answer
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 6: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/6.jpg)
PracticePractice
Round to the nearest hundredRound to the nearest hundred234234
ndash Since 2 is in the hundreds place I Since 2 is in the hundreds place I need to look at the 3 to need to look at the 3 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since three is less than 5 I Since three is less than 5 I should round downshould round down
ndash 200 is the correct answer200 is the correct answer
PracticePractice
Round to the nearest hundredRound to the nearest hundred769769
ndash Since 7 is in the hundreds place I Since 7 is in the hundreds place I need to look at the 6 to need to look at the 6 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 6 is greater than 5 I Since 6 is greater than 5 I should round up should round up
ndash The correct answer is 800The correct answer is 800
PracticePractice
Round to the nearest hundredRound to the nearest hundred457457
ndash Since 4 is in the hundreds place I Since 4 is in the hundreds place I need to look at the 5 to need to look at the 5 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 5 is equal to 5 I should Since 5 is equal to 5 I should round up round up
ndash 500 is the correct answer500 is the correct answer
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 7: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/7.jpg)
PracticePractice
Round to the nearest hundredRound to the nearest hundred769769
ndash Since 7 is in the hundreds place I Since 7 is in the hundreds place I need to look at the 6 to need to look at the 6 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 6 is greater than 5 I Since 6 is greater than 5 I should round up should round up
ndash The correct answer is 800The correct answer is 800
PracticePractice
Round to the nearest hundredRound to the nearest hundred457457
ndash Since 4 is in the hundreds place I Since 4 is in the hundreds place I need to look at the 5 to need to look at the 5 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 5 is equal to 5 I should Since 5 is equal to 5 I should round up round up
ndash 500 is the correct answer500 is the correct answer
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 8: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/8.jpg)
PracticePractice
Round to the nearest hundredRound to the nearest hundred457457
ndash Since 4 is in the hundreds place I Since 4 is in the hundreds place I need to look at the 5 to need to look at the 5 to determine whether to round up determine whether to round up or down What do you thinkor down What do you think
ndash Since 5 is equal to 5 I should Since 5 is equal to 5 I should round up round up
ndash 500 is the correct answer500 is the correct answer
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 9: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/9.jpg)
Think Yoursquove Got It Try Think Yoursquove Got It Try thesethese
346346
589589947947201201197197
300300600600900900200200200200
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 10: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/10.jpg)
Another Way to Look at Another Way to Look at RoundingRounding
Think of a number line (You may Think of a number line (You may have one in your classroom or on have one in your classroom or on your desk)your desk)
As you look at the number you are As you look at the number you are rounding think is it closer to the rounding think is it closer to the multiple of ten or one hundred below multiple of ten or one hundred below it or above it it or above it
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 11: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/11.jpg)
Round 7 to the nearest Round 7 to the nearest tenten
Look at the number lineLook at the number lineIs 7 closer to 0 or 10Is 7 closer to 0 or 107 is closer to 10 so we 7 is closer to 10 so we
round up to 10round up to 10
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 12: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/12.jpg)
Round 4 to the nearest Round 4 to the nearest tenten
Look at the number lineLook at the number lineIs 4 closer to 0 or 10Is 4 closer to 0 or 104 is closer to 0 so we 4 is closer to 0 so we
round down to 0round down to 0
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 13: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/13.jpg)
Truncating
We will use We will use truncating when dealing with decimals
If we want to round a decimal number to a whole number we will need to look at the digit(s) following the decimal point
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555
![Page 14: Estimation GLE 0506.1.2 Apply and adapt a variety of appropriate strategies to problem solving, including estimation, and reasonableness of the solution.](https://reader035.fdocuments.in/reader035/viewer/2022072013/56649e665503460f94b615c5/html5/thumbnails/14.jpg)
Truncating
Round to the nearest Round to the nearest whole numberwhole number
236236378378452452619619554554
24243838454562625555