Multiplying and Dividing FractionsReporting Categories: Computation and Algebraic Relationships

ELPS: Learning 1A

TEKS 5.3JL, 5.1A

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What I Know

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What I Want to Know

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What I Learned

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Review: Multiplying Fraction

Review: Multiplying Fraction

Review: Multiplying Fraction

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32

218

Review: Multiplying Fraction

Dividing FractionsJust like multiplying but with a flip.

Dividing Fractions

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Dividing Fractions

First thing is to rewrite the math problem into a multiplication problem.

By first, writing the first fraction.

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Dividing Fractions

Now we add the multiplication symbol.

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Dividing Fractions

This next part is a little tricky, we need to flip the second fraction.

This is called the reciprocal.

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Dividing Fractions

Now we can solve the original division problem in the form of a Multiplication problem by getting the reciprocal of the second fraction.

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2042

Lowest Terms for the Final Answer

Now we need to find the highest common divisor

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2042

1,2,4,5,10,201,2,3,6,7,14,21,42

Lowest Terms for the Final Answer

Now we need to find the highest common divisor

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2042

÷2÷2

1021

Real World

Examples:

Would like to know how much half of a ¾ cake is.

I have 2/3 of a tank of gas, how much can I use in the next 2 days.

Guided Practice

I have 2/3 of a tank of gas, how much can I use in the next 2 days.

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21

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26

1,21,2,3,6

Guided Practice

I have 2/3 of a tank of gas, how much can I use in the next 2 days.

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21

23

12

26÷2÷2

13

Individual Activity

WorksheetProblem #1 3/4 ÷ 5/8=Problem #2 1/12 ÷ 1/4 =Problem #3 7/12 ÷ 2/3 =

KWL

What I Know

K

What I Want to Know

W

What I Learned

L

Things to Keep in Mind

Rewrite division problem into a multiplication problem.

Second fraction does a flip, reciprocal.

If need be, lowest terms.

Extended Activity