Powers of 10
Decimal x Whole Number
Decimal x Decimal
Random
100

3.45 x 10

34.5

100

6 x 0.7

4.2

100

0.6 x 0.5

0.3

100

One inch equals 2.54 centimeters. How many centimeters is 10 inches?

25.4 cm

200

0.923 x 102

92.3

200

40 x 0.5

20

200

9.5 x 9.5

90.25

200

A forest preserve has an area of  1.6 square miles, and 0.3 of the forest preserve is open for hiking. How many square miles are open for hiking?

0.48

300

87.52 x 103

87,520

300

4 x 9.5

38

300

7.45 x 2.8

20.86

300

Write an expression, using fractions, that is equal to 0.48 x 0.3

48/100 x 3/10 or 48/100 x 30/100

400

A large envelope is 0.085 cm thick. How thick would a stack of 1,000 of these envelopes be?

85 cm

400

185 x 3.4

629

400

9.28 x 4.1

38.048

400

Every school day, Dylan rides the school bus 4.79 miles round trip between home and school. Estimate the total distance Dylan rode the school bus last month, when there were 21 school days.

20 x 5 = 100

500

Ashley is planning a trip to Canada. Her cell phone plan includes a roaming charge of $0.48 per minute. On her first day in Canada, Ashley calls her parents and talks for 100 minutes. What is the cost of this call?

$48

500

Nina hiked 4.32 kilometers. Her sister Angela hiked 4 times as far as Nina. How far did Angela hike?

17.28

500

A small business plans to order carpet for 4 identical offices. The floor of each office is 7.2 feet long and 5.8 feet wide. Find the area. How much carpet is needed for all 4 offices?

167.04 sq ft

500

Every day, Isabella practices the piano for 0.75 hour and the flute for 1.4 hours. What is the total number of hours that she practiced in April? Reminder: April has 30 days.

64.5 hours

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