# 2 25 Adding Subtracting Mixed Numbers

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Published on December 13, 2009

Author: mcdirector

Source: slideshare.net

Adding & Subtracting Mixed Numbers 12/10/09 EQ: How do I add or subtract mixed numbers? 12/9/2009 1 Bitsy Griffin Lessons 2-24 & 25

Review: How do you add fractions with the same denominator? 12/9/2009 2 Bitsy Griffin Lessons 2-24 & 25

Review: How do you add fractions with the different denominators? 12/9/2009 3 Bitsy Griffin Lessons 2-24 & 25

Review: How do you simplify a fraction? 12/9/2009 4 Bitsy Griffin Lessons 2-24 & 25

Suggestions: Estimate approximate answer + / - fractions. Denominators unlike? 12/9/2009 5 Bitsy Griffin Lessons 2-24 & 25

Suggestions: Simplify the fraction. you may end up with a fraction &gt; 1 In subtraction, you may have to rename! 12/9/2009 6 Bitsy Griffin Lessons 2-24 & 25

Suggestions: + / - whole numbers Add any whole #s from fraction to # 12/9/2009 7 Bitsy Griffin Lessons 2-24 & 25

Problem 1: 3 2/3 + 5 1/6 = Answer is close to? 9 12/9/2009 8 Bitsy Griffin Lessons 2-24 & 25

Problem 1: 3 2/3 + 5 1/6 = 2/3 + 1/6 4/6 + 1/6 = 5/6 3 + 5 = 8 12/9/2009 9 Bitsy Griffin Lessons 2-24 & 25

Problem 1: 8 + 5/6 = 8 5/6 12/9/2009 10 Bitsy Griffin Lessons 2-24 & 25

Problem 2: 2 2/3 + 1 ½ = Answer is close to? 4 or 5 12/9/2009 11 Bitsy Griffin Lessons 2-24 & 25

Problem 2: 2 2/3 + 1 ½ = 2/3 + ½ = 4/6 + 3/6 = 7/6 7/6 = 1 1/6 12/9/2009 12 Bitsy Griffin Lessons 2-24 & 25

Problem 2: 2 + 1 = 3 3 + 1 1/6 = 4 1/6 12/9/2009 13 Bitsy Griffin Lessons 2-24 & 25

Problem 3: 4 ¼ - 1 2/3 Answer be close to? 2 or 3 12/9/2009 14 Bitsy Griffin Lessons 2-24 & 25

Problem 3: 4 ¼ - 1 2/3 Answer be close to? 2 or 3 12/9/2009 15 Bitsy Griffin Lessons 2-24 & 25

Renaming practice: 8 ¼ = 7 + 4/4 + ¼ 7 5/4 12/9/2009 16 Bitsy Griffin Lessons 2-24 & 25

Renaming practice: 6 2/3 = 5 + 3/3 + 2/3 5 5/3 12/9/2009 17 Bitsy Griffin Lessons 2-24 & 25

Problem 3: 4 ¼ - 1 2/3 ¼ - 2/3 3/12 – 8/12 Oops! What can we do? 12/9/2009 18 Bitsy Griffin Lessons 2-24 & 25

Problem 3: Rename the first mixed number to 3 + 12/12 + 3/12 3 15/12 – 1 8/12 2 7/12 12/9/2009 19 Bitsy Griffin Lessons 2-24 & 25

Problem 3: Rename the first mixed number to 3 + 12/12 + 3/12 3 15/12 – 1 8/12 2 7/12 12/9/2009 20 Bitsy Griffin Lessons 2-24 & 25

Problem 4: 4 ¼ - 2 1/3 3/12 – 4/12 ??? 3 12/12 + 3/12 = 3 15/12 12/9/2009 21 Bitsy Griffin Lessons 2-24 & 25

Problem 4: 3 15/12 - 2 4/12 1 11/12 12/9/2009 22 Bitsy Griffin Lessons 2-24 & 25

EQ: How do I add or subtract mixed numbers? 12/9/2009 23 Bitsy Griffin Lessons 2-24 & 25

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