Decimal Multiplication Powers of Ten

What is 3.5 multiplied by 10?

• 25

• 15

• 40

• 35

Calculate 6.8 multiplied by 100.

• 60

• 68

• 600

• 680

Find the product of 4.2 and 1000.

• 42000

• 4400

• 4200

• 4000

If 7.6 is multiplied by 10000, what is the result?

• 760000

• 76000

• 7600

• 70000

Powers of Ten

When we multiply by powers of ten, we move the decimal to the ​ (a)   .

When we divide by powers of ten, we move the decimal to the ​ (b)   .

• right

• left

0.149 x 100

• 14.9

• 1.49

• 0.00149

• 1,490

10¹ x 5.18 =

• 5.18

• 51.8

• 518

• 5,180

• 4,560

• 456

• 45,600

• 45.6

10² x 943.01

• 94301

• 9430.1

• 94.301

• 9.4301

When multiplying a number by a power of ten, which way do you move the decimal?

• Left

• Right