Fraction Rules

Multiplying Fractions

Mixed Numbers

Dividing Fractions

Surprise

100

What needs to be the same when you add and subtract fractions?

The denominator

100

2/3 * 4/5

8/15

100

1 1/2 * 5

15/2 or 7 1/2

100

What is the reciprocal of

11/8

8/11

100

What are the steps for multiplying fractions?

Multiply straight across (multiply numerators and multiply denominators)

200

How do we change a whole number into a fraction?

Put a 1 in the denominator, or put it over 1.

200

3/5 * 7/8

21/40

200

5/6 * 1 1/3

10/9 or 1 1/9

200

3/8 -: 2/3

9/16

200

Find the reciprocal of 14

1/14

300

3 word phrase to help us with dividing fractions.

Keep - Change - Flip

300

4 * 7/8

7/2 or 3 1/2

300

4 1/2 -: 9

1/2

300

6 -: 5/8

48/5 or 9 3/5

300

Solve and simplify.

2/11 + 5/33

1/3

400

When dividing fractions, you are changing into ______________________ fractions?

multiplying

400

It took Jason 2 5/6 hours to drive to the beach. It took Mary twice as long. How long did it take Mary to drive to the beach?

17/3 or 5 2/3

400

Joe has 7 1/2 gallons of paint. He plans on using 1 1/2 gallons in each room. How many rooms is he able to paint?

5/1 or 5 rooms

400

1/2 -: 5/8

4/5

400

Solve and simplify.

(2/3 x 4) + 1/3

3/1 or 3

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.

500

2/9 * 3/8

1/12

500

2 2/3 * 5 1/4

14

500

3/8 -: 7/12

9/14

500

What is Mrs. Orazem's favorite Christmas movie?

ELF