__Objective__

At the end of this lesson, students should be able to multiply decimals by multiples of 10 or 100.

Decimals can easily be multiplied by multiples of 10 or 100.

__Example 1__

a. 1.52 x 20 b. 4.671 x 50

__Solution__

a. 1.52 x 20

(20 = 10 x 2)

First multiply the decimal by 10, and then multiply your answer by 2.

a. 5x 10 = 15.2

**Therefore, 1.52 x 20 = 30.4**

b. 4.671 x 50

4.671 x 50 = 4.671 x (10 x 5)

= (4.671 x 10) x 5

= 46.71 x 5

__Example 2__

a. 3.64 x 400 b. 7.805 x 800

__Solution__

Lesson Content

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