Multiplying and Dividing Fractions Review

Fraction Rules

100

How do we write 9 as a fraction?

Put a one under it

9/1

200

Before multiplying fractions, what should we do?

Simplify

Find common factors between any of the top number and any of the bottom numbers and divide to simplify

300

3 word phrase to help us with dividing fractions.

Keep - Change - Flip

400

When dividing fractions, you are really doing what operation?

A. Addition

B. Multiplication

C. Subtraction

D. Division

B. multiplying

500

What should you do first to mixed numbers when multiplying or dividing fractions?

Convert them to improper fractions.

Change them to improper fractions.

Make them improper fractionns.

Multiplying Fractions and Mixed Numbers

100

2/3 * 4/5

8/15

200

4/5 * (-7/8)

-7/10

300

4 1/2 * 5/6

15/4 or 3 3/4

400

-1 4/5 * 3 1/3

-6

500

-3/4 * (-5/9) * -1 4/5

-3/4

Multiplying and Dividing Mixed Numbers

100

1 1/2 * 5

15/2 or 7 1/2

200

5/6 * 1 1/3

10/9 or 1 1/9

300

-3 1/3 * 1/4

-5/6

400

-1 1/3 * (-2 1/8)

17/6 or 2 5/6

500

-2 2/3 * 5 1/4

-14

Dividing Fractions and Mixed Numbers

100

1/5 -: 1/2

2/5

200

-1/8 -: 3

-1/24

300

-1/2 -: 1/8

-4

400

-3 1/5 -: (-4 3/10)

32/43

500

-1/12 -: 3 5/6

-1/46

Surprise

100

How can we change 0.7 to a fraction?

7/10

Read it mathematically to write it as a fraction

200

How can we change 2/3 to a decimal?

Divide 2 by 3

0.666666666666....

300

Evaluate

abc when 

a = 2 1/3     b = -1/8  and c = 1/7

-1/24

400

What is 2/3 of 15?

Hint 2/3 x 15

10

500

-3 1/3 * (-1/7) * (-0.1)

-1/21

or

-0.047619