Math 6: DecimalsDividing Decimals by 10, 100, 1000, 10 000

Review

Multiply

2.134 x 10 0.246 x 1000 7.028 x 100

25.489 x 1000 7.89 x 100 6 x 1000

Explore

What happens to the value when you multiply?

What happens to the digits?

Explore

Use a calculator to calculate the following and put it in a place-value chart:

7/10 2.4/10 15.63/10

7/100 2.4/100 15.63/100

7/1000 2.4/1000 15.63/1000

Place Value Chart T.T. T H T O Decimal T H T

Dividing by 10

When you divide a decimal by 10, the decimal point moves one place to the left. Only one 0.

(Think: number becomes smaller)

Ex. 5.6/ 10 = 0.56

Dividing by 100

When you divide a decimal by 100, the decimal point moves two places to the left. There are two 0 in 100.

Ex. 5.6/100 = 0.056

Dividing by 1000

When you divide a decimal by 1000, the decimal point moves three places to the left. There are three 0 in 1000.

Ex. 5.6/1000 = 0.0056

Dividing by 10 000

When you divide a decimal by 10 000, the decimal point moves four places to the left. There are four 0 in 10 000.

Ex. 5.6/10 000 =0.00056

Mental Math

Complete these to solve each quotient.

What does quotient mean?

0.23/10 9/100 1.16/1000

12/1000 8.57/103.854/100

In Class Work

pg. 141-142 - # 1-6 and 9

Homework

pg. 58 + 59