Chapter 4 Multiply and Divide Fractions

Chapter 4 Multiply and Divide Fractions

Lesson 4-8 Divide Mixed Numbers Page 329

3 Find 3 ? 5. Write in simplest form. Check by multiplying.

3 3 5 5 15 45 4 84 8

Write each mixed number as an improper fraction.

15 8 4 45

Multiply by the reciprocal.

12

15 8 4 45

13

Divide 15 and 45 by the GCF, 15. Divide 4 and 8 by the GCF, 4.

2

Multiply.

3

Check:

5 5 2 45 2 83 8 3

15 1

45 2 8 3

41

15 or 3 3 44

Write each mixed number as an improper fraction. Divide 45 and 3 by the GCF, 3. Divide 2 and 8 by the GCF, 2.

Multiply.

5

Jay

is

cutting

a

roll

of

biscuit

dough

into

slices

that

are

inch

thick.

If

the

roll is 10 inches long, how many slices can he cut?

10 1 3 21 3 28 2 8

Write the mixed number as an improper fraction.

21 8 23

Multiply by the reciprocal.

74

21 8 2 3

11

Divide 21 and 3 by the GCF, 3. Divide 8 and 2 by the GCF, 2.

28

Multiply.

So, Jay can cut 28 slices of dough.

Glencoe Math, Course 1

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