1 Place Value with decimals through millionths. 2 Monday, Aug. 16 th ~ Groundworks #1 (do together...
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Transcript of 1 Place Value with decimals through millionths. 2 Monday, Aug. 16 th ~ Groundworks #1 (do together...
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Place Valuewith decimals through millionths
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Monday, Aug. 16th ~
• Groundworks #1 (do together as class)
• Groundworks #2 (let students do on own)
• Show ppt slides 3 and 4
• Cut out place value chart and glue (w/ glue stick) in spiral & on the back of the page, glue diff ways to write #s chart.
• Then proceed with ppt 5 and 6
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Starting with the ones place, let’s name the places together, in order, from ones to millions:
onestenshundredsthousandsten thousandshundred thousandsmillions
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onestenshundredsthousandsten thousandshundred thousandsmillions
Starting at the decimal point,the places are named in the same order except:• there is not a “ones” place• all names end in “ths”
(.) decimaltenthshundredthsthousandthsten thousandthshundred thousandthsmillionths
Now add place value chart to spiral notebook, andadd diff ways to read/write #s on another page.
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Practice (whole group…on screen)
1.http://www.thatquiz.org/tq/practice.html?placevalue (orally—with volunteers)
2. Write each number in standard form. (on a sheet of paper)
a) 83 thousand 903
b) (9 x 10,000) + (8 x 1,000) + (3 x 100) + (4 x 10) c) four hundred eighty-nine thousand, three hundred forty-one d) (5 x 100,000) + (3 x 1,000) + (7 x 10) e) 48 thousand 16 f) two hundred eight g) sixty-five billion, two million, fourteen thousand, threeAnswers to a-g are on the next slide….
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Practice Answers
2. Write each number in standard form. a) 83,903
b) 98,340 c) 489,341 d) 503,070 e) 48,016 f) 208 g) 65,002,014,003
STOP here on Mon.
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Wednesday, Aug. 18th~
• Groundworks #4 (w/ a partner)
• Compare answers w/a partner - WS “Athletes on Parade”
• Teacher will “spot check” #s 7, 8, 10, 15, 21, and 22.
• Continue on to the end of this ppt
• Then, students will do WS- Read/Write Decimals and check it in class.
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Students ~
• Use your place value chart (in your spiral notebook) to help you with today’s math problems.
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How to read and write decimals:
Write the following number in word form:
40.318
Step 1:Write the word namefor the #s to the left of or before the decimal point.
forty
Step 2 :Write and & the wordname for the #s to theright of the decimal point.
forty and three hundred eighteen
Step 3:Write the place value nameof the final digit after thedecimal point.
forty and three hundred eighteen thousandths
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Practice: try to write the following in word form.
1) 7.4005
2) 0.28067
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Check your answers
Practice: try to write the following in word form.
1) 7.4005
seven and four thousand five ten thousandths
2) 0.28067
twenty-eight thousand sixty-seven hundred thousandths
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0 . 7 2 0
th h t o . t h th
3 8 5
10
th100
th m
How would you write this # in word form?
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0 . 7 2 0
th h t o . t h th
3 8 5
10
th100
th m
Seven hundred twenty thousand, three hundred eighty-five millionths
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.
th h t o . t h th 10
th100
th m
What place is the 4 in ? 0. 00548
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0 . 0 0 5
th h t o . t h th
4 8
10
th100
th m
What place is the 4 in ? 0. 00548
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What number is in the hundred thousandths place?
8.097136
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What number is in the hundred thousandths place?
8.097136
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Try to write the following number in standard form:
Four and twenty-nine millionths
** Remember: when writing a decimal in standard form, start by placing the decimals in the correct place and then work backwards. Use your chart in your spiral notebook to help you write this number.
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4.000029the nine is in the millionths place
Four and twenty-nine millionths
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4 . 0 0 0
th h t o . t h
4.000029
th
0 2 9
10
th100
th m
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Now, try some more practice
http://www.thatquiz.org/tq/practice.html?placevalue
Note to teacher: Change the level to 6 and change the answers to just decimals.Have the students practice these questions out loud.