Big Ideas Math

​Multiplying Decimals

​Objective

• To multiply decima​ls by whole numbers

• ​To multiply decimals by decimals

• To use mental math​

Multiple Choice

12.3 x 8

• 96

• 98.4

• 9.84

• 45.21

Multiple Choice

5 x 14.51

• 725.5

• 37.9

• 2.971

• 72.55

Multiple Choice

0.88 x 9

• 7.92

• 9.88

• 9

• 79.2

​Using Mental Math

Multiple Choice

0.003 x 10

• 30

• 0.3

• 3

• 0.03

Multiple Choice

A quarter is 1.75 millimeters thick. How high is a stack of 1000 quarters? Solve using mental math.

• 176 mm

• 0.175 mm

• 1,750 mm

• 17.5 mm

Multiple Choice

8.1 x 5.6

• 40

• 4536

• 45.36

• 49.88

Multiple Choice

2.7 x 9.04

• 24.408

• 2.4408

• 24408

• 0.24408

Multiple Choice

6.32 x 0.09

• 4.788

• 54.572

• 7.632

• 0.5688

Multiple Choice

1.785 x 0.2

• 38.954

• 0.357

• 1.787

• 35.7