1. Adding & Subtracting Fractions Lesson 9

2. Math Vocabulary Fraction: A math term that shows part of a whole or part of a set. Numerator: TOP number of a fraction Denominator: BOTTOM number of a fraction Mixed Number: A whole number and a fraction together

3. Basic Fraction Review… Things you MUST know about fractions: fraction = numerator denominator same # = 1 same # Whole #  fraction = whole # 1 5  numerator 6  denominator 3 = 1 8 = 1 15 = 1 3 8 15 5 = 5 17 = 17 2 = 2 1 1 1

4. Adding & Subtracting Fractions In order to ADD or SUBTRACT fractions… all fractions MUST have SAME (bottom) DENOMINATOR

5. Steps… 1)ALL #s are in fraction form 2)(bottom) denominators are the same 3)Fraction + Fraction *For mixed #s: Whole # + whole # & Fraction + Fraction 4) top +/- top. bottom stays the same 4 + 5 11 11 __ 6 12 12

6. Steps for Mixed # problems… 1)ALL #s are in fraction form 2)(bottom) denominators are the same 3)*For mixed #s: Whole # + whole # & Fraction + Fraction 4) top +/- top. bottom stays the same 7 2 + 3 1 4 4 12 3 __ 8 2 7 7 5 1 + 2 4 5 5

7. Practice… a) 3 + 10 15 15 b) 6 __ 3 8 8 c) 12 2 __ 5 1 5 5 d) 10 4 + 6 4 8 8