Multiplying by Powers of 10
Dividing by Powers of 10
Multiplying Decimals
Dividing Decimals
Pot Luck
100

1.32 x 102 = ?

What is 132?

100

567.12 ÷ 103 = ?

What is 0.56712?

100

0.6 x 0.4 = 

What is 0.24?

100

What is 24.8 ÷ 8?

What is 3.1?

100

Ryan ran 36.39 miles during the week.  If he ran 3 days this week, how many miles did he run each day?

What is 12.13 miles per day?
200

What power of 10 would you have to multiply 43.27 by to get 43,270,000?

What is 106 ?

200

True or False?  56.78 ÷ 102 = 5.678 ÷ 101

What is True? If you divide 56.78 by 102 you will get 0.5678, and if you divide 5.678 by 10you will get 0.5678.  Therefore, it is true.
200

12.3 x 3.4 = ?

What is 41.82?

200

What is 36.12 ÷ 1.2?

What is 30.1?

200

Solve: 23 x 2 - 36 ÷ 2 + (10 - 8)?

What is 30?

300

Janet said that 103 is 3000.  Is Janet correct? Explain.

 

No, Janet is not correct, she multiplied the power 3 by 1,000, she needed to multiply 10 by 10 three times which would be 1,000.

300

Paul says that 6.709 ÷ 102 is 670.9, is Paul correct? Explain.

No, Paul is not correct, Paul multiplied 6.709 times 102 power, he should have divided by 102. When you divide by 102 you will get 0.06709 because you move the decimal 2 places to the left, which shows that you shift the number two places to the right on the place value chart.


300

Which equations correctly multiply by a power of 10? Choose all that apply

a) 6.24 x 10² = 624

b) 10.49 x 10 = 1,049

c) 7.223 x 10³ = 7,223

d) 3.84 x 10² = 38.4

e) 32.14 x 10 = 321.4

What is a, c, and e?

300

Three friends went out to dinner.  The total bill came to $37.74, they decided to split the bill evenly.  How much will each friend pay?

What is $12.58?

300

Write the numerical expression for:  The difference of 23 and 4

What is 23-4?

400

True or False?  47.12 x 102 = 471.2 x 100

what is false? If you multiply 47.12 x 102 it equals 4,712.  When you multiply 471.2 x 10it equals 471.2 because 100 is 1. 

400

78.987 ÷ 10,000 = ?

What is 0.0078987?

400

What is 3/10 x 2/10 =?

What is 6/100?

400

What happens to the dividend when you divide 45.672 by 103

What is decrease? 45.627 ÷ 103 = 0.045627, you can see that the dividend is getting smaller, or decreasing.

400

Write the written expression for 27 - (5x9)

What is the product of five and nine subtracted from twenty-seven? or What is twenty-seven minus five times nine?

500

Ken bought a Jacket on the clearance rack that costs $8.99. Kellen bought the same jacket four weeks ago and it cost $89.90. Which power of 10 could Ken's cost be multiplied by to get the amount that amount Kellen spent on his Jacket?

What is 101 or 10?

500

What power of 10 would you have to divide 87.659 by to get 0.087659?

What is 103 ?

500

Simone wanted to buy a new dress for a party.  If she babysits for 8 hours and earns $4.50 per hour, How much money did she earn?  Would she earn more money if she cleans houses for $5.25 per hour for 7 hours?

What is $36? Yes, What is $36.75?

500

What is 44.84 ÷ 0.04?

What is 1,121?

500

Dylan says he is going to score 102 on his math test.  What will Dylan's math test score be?

What is 100?