Multiply By Decimals

Multiply By Decimals

Multiple Choice

What happens when we multiply a number by 10, 100 or 1000?

• The product gets smaller

• The product gets larger

Multiple Choice

How many shifts does a number make when multiplying by 1000?

• 1 shift to the left

• 2 shifts to the left

• 3 shifts to the left

Multiple Choice

How many shifts does a number make when multiplying by 10

• 1 Shift to the Left

• 2 Shifts to the Left

• 3 Shifts to the Left

What do these numbers have in common?

Multiple Choice

What decimal is the same as 1/10?

• 0.1

• 0.01

• 0.001

Multiple Choice

What decimal is the same as 1/100?

• 0.1

• 0.01

• 0.001

When we multiply by a whole number our product gets larger.

24 x 10 = 240

When we multiply by a fraction or a decimal our product gets smaller.

24 x 0.1 = 2.4

Multiple Choice

24 x 0.01 =

• 24

• 2.4

• 0.24

Multiple Choice

689 x 0.1 =

• 6.89

• 0.689

• 68.9

Multiple Choice

42 x 0.01 =

• 0.42

• 4.2

• 42

Multiple Choice

837 x 0.001 =

• 8.37

• 0.837

• 83.7

The same rules apply when you are multiplying two decimals.

0.2 x 0.4 = 0.08

0.06 x 0.3 = 0.018

Multiple Choice

0.4 x 0.3 =

• 1.2

• 0.12

• 0.012

Multiple Choice

0.02 x 0.7

• 1.4

• 0.014

• 0.14

Multiple Choice

0.1 x 0.6 =

• 0.6

• 0.06

• 0.006

Poll

How do you feel about multiplying decimals?

• I understand the whole lesson.

• I understand most of the lesson.

• I don’t understand the lesson.