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Add/Subtract fractions same denominator

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Presentation on theme: "Add/Subtract fractions same denominator"— Presentation transcript:

1 Add/Subtract fractions same denominator
Objective: students will be able to add and subtract fractions with like denominators.

2 Information Like fractions: same denominator.
Add: add numerators, keep denominators. Reduce if needed Ex: 1/5 + 2/5 = 3/5 Subtraction: change to addition, use addition rules

3 Ex: add/subtract fractions
1/8 + 2/8 10/19 + 8/19 4/15 – 7/15 1/12 – (-8/12)

4 ST: add/subtract fractions
4/9 + 1/9 -5/7 + 5/7 -15/27 – 13/27 10/15 – 8/15

5 Information: Add/subtract Mixed numbers
Steps Change to improper Add/subtract Leave or change to mixed fraction (reduce)

6 Ex: mixed/improper fraction
3 ¾ + 1 ¾ 7 1/5 – 2 3/5

7 St: improper/mixed fraction
2 4/ /5 2 1/4 – 5 3/4

8 Information: variables and fractions
2a/20 + 5a/20 4x/8 + x/8

9 ST: variables and fractions
-10/6p + 17/6p 8m/21 – 5m/21

10 Wrap-up Questions/Comments Hw: workbook pg. 35


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