Multiplying Decimals by Powers of 10 Exponents

When you multiply a decimal number by a power of ten the decimal should move to the _______.

• left

• right

• middle

When multiplying a decimal number by a power of ten, the exponent (or the 0's in the power of ten) will tell you______________________________.

• How many zeros you will have in your answer

• How many digits will be in the answer

• The number of places to move your decimal to the LEFT

• The number of places to move your decimal to the RIGHT

• 1 place to the right

• 1 place to the left

• 2 places to the right

• 2 places to the left

4 x 100 ⁼

• 24

• 4

• 4,000

• 400

100 x 4.78 =

• 4.78

• 47.8

• 478

• 4,780

80.72 x 1000 =

• 80,720

• 8,072

• 807,200

• 807.20

23 x 100

• 23,000

• 230

• 230,000

• 2,300

• 1.09
  

• 109

• 10.9

• 1,090

• 7.8

• 780

• 0.78

• 78

83.05 x 100 = ____

• 8.305
• 83.05
• 830.5
• 8305