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Published byJewel O’Brien’ Modified over 8 years ago
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Dividing Fractions
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Division Review
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12 ÷ 5 How many times can 5 go into 12?
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14 ÷ ¾ = How many times can ¾ go into 14?
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Problem 4.1 A Naylah plans to make small cheese pizzas to sell at a school fundraiser. She has nine bars of cheese. How many pizzas can she make if each pizza needs the given amount of cheese?
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Problem 4.1 B
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Do you see a pattern??? 9 ÷ 1/3 = 27 9 ÷ 1/4 = 36 9 ÷ 1/5 = 45 9 ÷ 1/6 = 54 9 ÷ 1/7 = 63 9 ÷ 1/8 = 72 9 ÷ 1/3 = 27 9 ÷ 2/3 = 13 1/2 9 ÷ 3/3 = 9 9 ÷ 4/3 = 6 3/4
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Whole #s ÷ Fraction Whole # ÷ Numerator, x Denominator Whole # x Denominator, ÷ Numerator Denominator ÷ Numerator, x Whole #
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4.1 Review I have 5 cups of flour at home and want to make muffins. How many muffins can be made if each takes 3/5 cup of flour? ▫Draw a model to represent the problem ▫Solve When dividing any whole number by any fraction, you…
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4.2 Dividing a Fraction by a Whole # Draw a picture to represent the problem. Ms. Li brings peanuts to be shared equally by members of groups winning each game. How much of a pound of peanuts will each student get in the given situations? 1.Four students share ½ pounds of peanuts
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2.Three students share ¼ pound of peanuts 3.Two students share 1/5 pound of peanuts
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Steps to Dividing Fractions Re-write any _________ as a _________ Re-write any _______ _______ as an ________ fraction Keep the 1 st number the ________ Change from ________ to _________ Re-write the 2 nd number as it’s ___________ (_____) Solve
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Steps to Dividing Fractions Re-write any whole # as a fraction Re-write any mixed # as an improper fraction Keep the 1 st number the same Change from ÷ to x Re-write the 2 nd number as it’s reciprocal (flip) Solve
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Skill wkst. - Front
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Wednesday 1/27/10 Find the reciprocal of each number. 1.¾ 2.11/12 3.1/8 4.4 ½ 5.35
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Skill wkst. - Back
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