Fraction Multiplicatio

nAnd Cancelation

Fraction Multiplication• Here are some

fraction multiplication problems

• Can you tell how to multiply fraction from these examples?

4 1 45 7 35

6 4 245 10 50

21

10

7

5

3

2

3 5 154 12 48

1 1 13 3 9

2 5 103 1 3

Multiplication• Multiply numerator by numerator• And denominator by denominator

2 5 103 1 3

1 2 1 2

1 2 1 2

N N N ND D D D

Try some.• Multiply the following:

4 29 3

1 53 8

2 43 5

5 58 8

Answers• Multiply the following:

4 2 89 3 27

1 5 53 8 24

2 4 83 5 15

5 5 258 8 64

Fraction Division

Opposite of Multiplication

The opposite number:

• Invert• Called the reciprocal•

3

4make invert to

4

3

To Divide

• Invert the second number

• Multiply

15

8

3

4

5

2

4

3

5

2

•

24

1

1

2

4

1

2

1

4

1

8

1

2

1

4

1

•

5

12

4

3

5

11

4

3

11

5

4

3

44

15

11

5

4

3