Unit 6 Pretest (EM)

When multiplying by a power of 10, you should...

• move the decimal to the right
• move the decimal to the left
• add a 10 to the front of the number
• none of these.

8.6 x 10³ = ?

• 860
• 8600
• 8.6
• 86,000

8.6 ÷ 10² = ?

• .86
• 8.6
• 860
• .086

43.56 x 10² = ?

• 4356
• 435.6
• 4.356
• 43,560

When dividing by a power of 10, you should...

• move the decimal to the right
• move the decimal to the left
• don't move the decimal at all
• none of these 

43.56 ÷ 10³

• 0.4356
• .04356
• 4356
• 4.356

340 cm = ____ m

• 3
• 34
• 3.4
• 1000

5 meters = _____ centimeters

• 50
• .05
• 500
• 5000

The class is reusing a curtain to create green screen background.  The curtain measures 1.8 meters long.  They decide to shorten them by 6 centimeters.  How long will the background be when it is finished?

• 1.74 meters or 174 centimeters
• 1.2 meters or 120 centimeters
• 5.8 meters
• This answer cannot be determined

45.3 x 4.5 = ?

• 40.77
• 203.85
• 2038.5
• 407.7