Add/Subtract fractions same denominator

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Adding and Subtracting Fractions with Like Denominators.

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Presentation transcript:

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

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

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

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

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

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

St: improper/mixed fraction 2 4/5 + -8 4/5 2 1/4 – 5 3/4

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

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

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