Mastering Multiplication and Division of Rational Numbers

Add the numerators and denominators

Cross-cancel the fractions

Convert to improper fractions

Multiply the numerators and denominators straight across

5/6

5/8

15/24

1/2

To find the reciprocal

To convert fractions to mixed numbers

To simplify the fractions before multiplying

To add the fractions

5/6

5/8

1/2

3/4

Multiply the numerator by the denominator

Divide the numerator by the denominator

Multiply the whole number by the denominator and add the numerator

Add the whole number to the numerator

7/3

6/3

5/3

8/3

1/5

5

1

5/1

-8/3

3/8

8/3

-3/8

Keep, Flip, Cross

Keep, Flip, Change

Keep, Find, Change

Keep, Find, Cancel

20/60

1/3

15/4

5/4