Converting Fractions and Decimals Objective: Learn to convert fractions and decimals.
Math unit1 decimals and fractions
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Transcript of Math unit1 decimals and fractions
![Page 1: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/1.jpg)
Unit 1Decimals & Fractions
Presentation 1 Multiplying and Dividing Decimals
Presentation 2 Converting Fractions and Decimals
Presentation 3 Negative Numbers
Presentation 4 Operations with Negative Numbers
Presentation 5 Estimating Answers
![Page 2: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/2.jpg)
Unit 1Decimals & Fractions
Multiplying and Dividing Decimals
![Page 3: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/3.jpg)
To multiply by 100, move the decimal point 2 places to the right, giving:
similarly
![Page 4: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/4.jpg)
To divide by 100, move the decimal point 2 places to the left, giving:
similarly
![Page 5: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/5.jpg)
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Multiplying and Dividing Decimals
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Presentation 2 Converting Fractions and Decimals
Presentation 3 Negative Numbers
Presentation 4 Operations with Negative Numbers
Presentation 5 Estimating Answers
![Page 6: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/6.jpg)
Unit 1Decimals & FractionsConverting Fractions and
Decimals
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Fractions to Decimals
Express as a decimal.
Here it is best to divide out:
![Page 8: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/8.jpg)
Express as a decimal.
Here it is easier to make the denominator a multiple of 10
![Page 9: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/9.jpg)
Express as a decimal in its simplest form
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Converting Fractions and Decimals
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Return to the Start
Presentation 1 Multiplying and Dividing Decimals
Presentation 3 Negative Numbers
Presentation 4 Operations with Negative Numbers
Presentation 5 Estimating Answers
![Page 11: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/11.jpg)
Unit 1Decimals & Fractions
Negative Numbers
![Page 12: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/12.jpg)
Example 1
What is 15oC less than 26oC?
Solution
26oC – 15oC = 11oC
Example 2
What is 15oC less than 10oC?
Solution
10oC – 15oC = – 5oC
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Negative Numbers
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Return to the Start
Presentation 1 Multiplying and Dividing Decimals
Presentation 2 Converting Fractions and Decimals
Presentation 4 Operations with Negative Numbers
Presentation 5 Estimating Answers
![Page 14: Math unit1 decimals and fractions](https://reader036.fdocuments.in/reader036/viewer/2022062311/58edca771a28aba9448b46a7/html5/thumbnails/14.jpg)
Unit 1Decimals & FractionsOperations with Negative
Numbers
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Remember …
Example 1
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Remember …
Example 2
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Remember …
Example 3
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Remember …
Example 4
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Operations with Negative Numbers
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Presentation 1 Multiplying and Dividing Decimals
Presentation 2 Converting Fractions and Decimals
Presentation 3 Negative Numbers
Presentation 5 Estimating Answers
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Unit 1Decimals & Fractions
Estimating Answers
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It is important to be able to estimate answers to complex calculations.
Without a calculator which of the answers is equal to ?
A 1∙649 B 16∙494 C 164∙945
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Without a calculator which of the answers is equal to ?
You have to approximate each answer in the calculation. Hence, for example
A 1∙649 B 16∙494 C 164∙945
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Estimating Answers
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Return to the Start
Presentation 1 Multiplying and Dividing Decimals
Presentation 2 Converting Fractions and Decimals
Presentation 3 Negative Numbers
Presentation 4 Operations with Negative Numbers