Multiplying and Dividing Fractions

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Multiplying and Dividing Fractions

• Without this nifty
• companion.
• By
• Erin Mouw

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Multiplying fractions

• When multiplying fractions multiply across
• 2 / 3 x 1 / 5
• 2 x 1 2
• 3 x 5 15 gt 2 / 15

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Multiplying fractions

• When multiplying, simplify your answers
• 1 / 2 x 2 / 3
• 1 x 2 2 2 1
• 2 x 3 6 2 3
• If you divide 2 / 6 by 2
• the answer then is 1 / 3

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Multiplying fractions

• Now you try.
• 3 / 4 x 3 / 5
• a. 10/15 b. 8/25
• c. 12/23 d. 9/20

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By George I think you got it!
Let's try another one!

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Oopsy Daisy.

• Dont give up now.
• Well have better luck next time.

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So you think you're all that...

• 6 / 13
• 1 / 2
• 3 / 4
• 2 / 3

Let's try this one
2 / 3 x 3 / 4
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Turn that frown upside down...
Shall we try again?
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You are doing great!

• Lets move on to something new.
• Lets try dividing fractions.

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Dividing fractions.

• When dividing fractions, do the following
• The first number stays the same
• Change the sign to multiply
• The second number use the reciprocal
• Then multiply as shown earlier
• 3 / 4 1 / 2
• 3 / 4 X 2 / 1 6 / 4 gt 3 / 2

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So lets try a couple

• 5/8 1 / 3
• A. 5 / 24 C. 5 / 12
• B. 5 / 3 D. 15 / 8

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Sorry Charlie
Why not try again?
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Wow! You are on a roll!
Do you have one more in you?
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Last one.

• Ill try to stump you.
• 3 / 4 7 / 8
• 5 / 7 C. 3 / 7
• 4 / 7 D. 6 / 7

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Gotcha!!
Let's try this again?
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Way to go! You deserve a round of applause!
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That was an awesome job.

• If you need further assistance
• or would like to try additional
• problems, visit this website
• http//www.321know.com/fra.htmtopic23