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Writing Fractions as Decimals What are the parts to a fraction? a b The top part of a fraction is called the NUMERATOR. The bottom part of a fraction is.

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Presentation on theme: "Writing Fractions as Decimals What are the parts to a fraction? a b The top part of a fraction is called the NUMERATOR. The bottom part of a fraction is."— Presentation transcript:

1 Writing Fractions as Decimals What are the parts to a fraction? a b The top part of a fraction is called the NUMERATOR. The bottom part of a fraction is the DENOMINATOR

2 To change a fraction to a decimal we….. Divide the numerator by the denominator: Numerator ÷ denominator = decimal

3 Try the following using a calculator and record the results on your dry board. 3/8 2/3 0.375 0.66666666 What is the difference between these two answers?

4 One ends: 0.375 The other can go on forever: 0.666666666 When a decimal comes to an end, it is called a TERMINATING DECIMAL When a decimal repeats and does not end it is called a REPEATING DECIMAL

5 REPEATING DECIMALS: We can rewrite repeating decimals using the bar notation. Place a bar over the repeating numbers to indicate that they repeat forever. 0.66666 = 0.6

6 Change each fraction to a decimal. If the decimal is repeating use the bar notation. State whether the decimal is terminating or repeating. -6/11 -0.545454 = -0.54

7 2/15 0.1333333 = 0.13

8 7/8 0.875

9 -5/9 -0.555555 = -0.5

10 What if we have a mixed number? How do we change it to a decimal? There are two ways you can solve this. 1. Keep the whole number and change the fraction part to a decimal: 3 ½ = (keep the 3) 1 ÷ 2= 0.5 (change the ½ to a decimal) 3.5

11 OR 2. Change the fraction to an improper fraction and then divide: 3 ½ = 7/2 = 7÷ 2 = 3.5

12 Try the following: 7 3/10 7.3

13 5 1/8 5.125

14 8 3/5 8.6

15 -6 9/10 -6.9

16 What about changing decimals to fractions? How do you think you can change a decimal to a fraction? Think Share Write

17 Decimal to Fraction… To change a decimal to a fraction 1. State the decimal correctly: 0.56 = 56 hundredths = 56/100 2. Simplify: 56/100 = 14/25

18 Try the following- Change each decimal to a fraction: 0.3 3/10

19 Decimal to fraction: 2.8 2 8/10 2 4/5

20 Decimal to Fraction: 0.9 9/10

21 Decimal to Fraction: 2.66 2 66/100 2 33/50

22 You will receive WS 258 Only write your name on this sheet Solve number 1 on your own paper When you hear the timer rotate papers Repeat with teacher directions!


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