Multiplying and Dividing Decimals by 10, 100,

and 1,000

Multiplying and Dividing Decimals by 10, 100,

and 1,000

Lesson 1-8Lesson 1-8

The Basics:The Basics:

• When you multiply by 10, 100, or 1,000, you can move the decimal point to the right.

• The number of decimal places you move is the same as the number of zeroes you are multiplying by.

• When you divide by 10, 100, or 1,000, you can move the decimal point to the left. Move the decimal point once for each zero you are dividing by.

• When you multiply by 10, 100, or 1,000, you can move the decimal point to the right.

• The number of decimal places you move is the same as the number of zeroes you are multiplying by.

• When you divide by 10, 100, or 1,000, you can move the decimal point to the left. Move the decimal point once for each zero you are dividing by.

1.492 x 1001.492 x 100Move the decimal to the right: two spaces.

149.2149.2

2,124.94 ÷ 1,0002,124.94 ÷ 1,000Move the decimal to the left: three spaces.

2.12494

4.2 ÷ 1004.2 ÷ 100Move the decimal point to the left: two spaces. Add a zero for the second space.

.042.042

15.36 x 1,00015.36 x 1,000Move the decimal point to the right: three spaces. Add a zero for the third space.

15,36015,360

Classwork:Play this concentration game to help you practice

multiplying and dividing decimals by powers of ten.http://www.quia.com/cc/65637.html

Homework Timep. 41, 1-35 ODD

Classwork:Play this concentration game to help you practice

multiplying and dividing decimals by powers of ten.http://www.quia.com/cc/65637.html

Homework Timep. 41, 1-35 ODD