Multiply Decimals & Powers of 10 Test Review

Which expression matches 10,000?

• 10⁴ because they are 4 zeroes

• 10⁸ because they are 9 zeroes

4.6 x 10,000 is equal to ​ (a)   because there are ​ (b)   zeroes in 10,000. This means I need to move the decimal over four spots to make the number 10,000 times ​ (c)  

• 46,000
• four
• bigger
• smaller

10³ =

What is 0.465 x 10²

• 465

• 46.5

• 0.000462

• 0.00465

Match the following

**When you divide by a multiply of 10, you move the decimal to the LEFT

• 0.4234

• 4.234 ÷ 1,000

• 0.04234

• 4.234 ÷ 10

• 0.004324

• 4.234 ÷ 100

When I multiply 0.12 x 0.2 there will be ​ (a)   ​ digits ​ (b)   the decimal, since there are a total of three digits after the decimal in my factors.

• three
• after
• two

0.12 x 0.2 =

• 0.24

• 0.024

• 240

Answer explanation

The answer is 0.024 because I still need to multiply and make sure there are three digits are the zero to match!

How would you right 100,000 with an exponent?

Mathematical Equivalence

ON

What is the product of 0.56 x 0.4

• 2.24

• 0.624

• 0.224

Fill in the missing number:

0.2 x _____ = 0.10