04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Adding & Subtracting Mixed Numbers

12/10/09EQ: How do I add or subtract mixed numbers?

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Review:•How do you add fractions with the same denominator?

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Review:•How do you add fractions with the different denominators?

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Review:•How do you simplify a fraction?

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Suggestions:•Estimate approximate answer

•+ / - fractions.•Denominators unlike?

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Suggestions:•Simplify the fraction.•you may end up with a fraction > 1

• In subtraction, you may have to rename!

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Suggestions:•+ / - whole numbers•Add any whole #s from fraction to #

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 1:•3 2/3 + 5 1/6 =•Answer is close to?•9

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 1:•3 2/3 + 5 1/6 =•2/3 + 1/6•4/6 + 1/6 = 5/6•3 + 5 = 8

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 1:•8 + 5/6 =•8 5/6

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 2:•2 2/3 + 1 ½ =•Answer is close to?•4 or 5

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 2:•2 2/3 + 1 ½ =•2/3 + ½ =•4/6 + 3/6 = 7/6•7/6 = 1 1/6

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 2:•2 + 1 = 3•3 + 1 1/6 = 4 1/6

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 3:•4 ¼ - 1 2/3•Answer be close to?•2 or 3

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 3:•4 ¼ - 1 2/3•Answer be close to?•2 or 3

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Renaming practice:•8 ¼ = •7 + 4/4 + ¼ •7 5/4

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Renaming practice:•6 2/3 = •5 + 3/3 + 2/3•5 5/3

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 3:•4 ¼ - 1 2/3•¼ - 2/3•3/12 – 8/12•Oops! What can we do?

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 3:•Rename the first mixed number to

•3 + 12/12 + 3/12•3 15/12 – 1 8/12•2 7/12

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 3:•Rename the first mixed number to

•3 + 12/12 + 3/12•3 15/12 – 1 8/12•2 7/12

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 4:•4 ¼ - 2 1/3 •3/12 – 4/12•???•3 12/12 + 3/12 =•3 15/12

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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Problem 4:•3 15/12 - 2 4/12•1 11/12

04/10/2023 Bitsy Griffin Lessons 2-24 & 25

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EQ:•How do I add or subtract mixed numbers?