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Learn How to add and subtract fractions using models

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Presentation on theme: "Learn How to add and subtract fractions using models"— Presentation transcript:

1 Learn How to add and subtract fractions using models

2 Count all to find the sum.
When you were little… 10 50 30 55 20 40 53 57 51 52 54 56 = ____ 57 61 and 7/8 Teacher models counting EACH piece ie. 10, 20, 21, 22, 23, 33, 43, 53, 54, 55, …..61 Teacher models counting EACH piece ie. 1/8, 2/8, 3/8, 4/8, 5/8, 6/8

3 Count all to find the sum.
How do you think you can use strategy with fractions? 5 eighths 3 eighths 0 eighths 4 eighths 6 eighths 2 eighths 1 eighths = ____ 𝟔 𝟖 6/8 Teacher models counting EACH piece ie. 1/8, 2/8, 3/8, 4/8, 5/8, 6/8

4 Count back to find the difference.
When you were little… = ____ 47 50 48 73 47 49 52 63 53 51 47 Teacher models counting back – start at the greater number and count back- 73, (count back the blocks) 63, 53, 52, 51, 50…

5 Count back to find the difference.
How do you think you can use strategy with fractions? 6 8 − = ____ 𝟒 𝟖 47 and 4/8 Teacher models counting back – start at the greater number and count back- 73, (count back the blocks) 63, 53, 52, 51, 50… Teacher models counting back – start at the greater number and count back- 6/8, (count back the blocks) 5/8, 4/8 6 eighths 5 eighths 4 eighths

6 Adding Fractions on a number line
Bobby ate of the apple before lunch, and of the apple during lunch. How much of the apple to Bobby eat? 1 5 2 5 3 5 4 5 1 5 2 5 3 5 4 5

7 Subtracting Fractions on a number line
Sue cut yards of ribbon. She used ribbon for her hair. How much ribbon did Sue have left? 1 5 2 5 3 5 4 5 6 5 7 5 8 5 9 5

8 Add and subtract fractions using models
Try it Out!

9 Find the value of the expression.

10 Find the value of the expression.


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