3-5 Dividing Decimals by Whole Numbers

I CAN divide decimals by whole numbers.

3-5 Dividing Decimals by Whole Numbers

Divisor

Quotient

Remember!

0.150.755

Dividend

3-5 Dividing Decimals by Whole Numbers

Example 1: Dividing a Decimal by a Whole Number

Find the quotient.

A. 0.84 ÷ 3

3 0.84

– 624

– 240

Place a decimal point in the quotient directly above the decimal point in the dividend. Divide as you would with whole numbers.

0.28

3-5 Dividing Decimals by Whole Numbers

Example 1: Dividing a Decimal by a Whole Number

Find the quotient.

B. 3.56 ÷ 4

4 3.56

– 3236

– 360

Place a decimal point in the quotient directly above the decimal point in the dividend. Divide as you would with whole numbers.

0.89

3-5 Dividing Decimals by Whole Numbers

You Try! Example 1

Find the quotient.

A. 0.72 ÷ 3

3 0.72

– 612

– 120

Place a decimal point in the quotient directly above the decimal point in the dividend. Divide as you would with whole numbers.

0.24

3-5 Dividing Decimals by Whole Numbers

You Try! Example 1

Find the quotient.

B. 2.96 ÷ 4

4 2.96

– 2816

– 160

Place a decimal point in the quotient directly above the decimal point in the dividend. Divide as you would with whole numbers.

0.74

3-5 Dividing Decimals by Whole Numbers

Example 3: Consumer Application Jodi and three of her friends are making a tile design. The materials cost $10.12. If they share the cost equally, how much should each person pay?

4 $10.12– 8

21– 20

12

$2.53

$10.12 should be divided into four equal groups.

Divide $10.12 by 4.

– 120

Place a decimal point in the quotient directly above the decimal point in the dividend. Divide as you would with whole numbers.

Each person should pay $2.53.

3-5 Dividing Decimals by Whole Numbers

You Try! Example 3

Ty and three of his friends are building a fence. The lumber costs $21.44. If they share the cost equally, how much should each person pay?

4 $21.44– 20

14– 12

24

$5.36

$21.44 should be divided into four equal groups.

Divide $21.44 by 4.

– 240

Place a decimal point in the quotient directly above the decimal point in the dividend. Divide as you would with whole numbers.

3-5 Dividing Decimals by Whole Numbers

Reflection

CAN YOU divide decimals by whole numbers?

3-5 Dividing Decimals by Whole Numbers

Lesson Quiz

Find each quotient.

1. 3.12 ÷ 8 2. 5.68 ÷ 8

3. The tennis team is having 3 of their tennis

rackets restrung. The total cost is $54.75. What is

the average cost per racket?

0.710.39

$18.25

3-5 Dividing Decimals by Whole Numbers

HOMEWORK

pp. 117-118: 1

-4, 9-13, 1

8, 26