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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?