Estimate
Powers of 10
Decimal by Whole
Decimal by Whole
Word Problems
100

23.3 by 6.6

20 by 6 = 4

100

60.3 by 10 (power 2)

0.603

100

17.22 by 6

2.87

100

70 by 10

7

100

Jamie bought 10 pencils from the school store and paid a total of $1.30. How much did each pencil cost?

$0.13

200

65.4 by 7.34

70 by 7 = 10 

63 by 7 = 9

200

88.2 by 10 (power 2)

0.882

200

1.3 by 10

0.13

200

3.8 by 10

0.38

200

Over the course of 6 days, Tony ran 17.22 miles. He ran the same distance each day. How far did Tony run each day?

2.87 miles

300

 12.8 by 4.3

12 by 4 = 3

300

0.63 by 10

0.063

300

1.5 by 10

0.15

300

20.25 by 9

2.25

300

A panel in one of the hallways of Emilio's school is rectangular with an area of 44.52 square feet. If the panel is 21 feet long, how wide is it?

2.12 ft

400

43.94 by 5.2 =

40 by 5 = 8

400

3,072 by 10 (power of 3(

3.072

400

44.52 by 21

2.12

400

35.08 by 4

8.77

400

If 8 pounds of peanuts costs $12, how much does 1 pound of peanut cost? How much does 10 pounds cost?

1 pound = $1.50

10 pounds = $15

500

69.48 by 7.2 =

70 by 7 = 10

500

6,030 by 10 (power 3)

6.03

500

50.8 by 4

12.7

500

46.25 by 37

1.25

500

A box of oil paints contains 9 cans of different colors. Each can is the same weight. If the box weighs 20.25 pounds, how much does each weigh? How many pounds in total would a box of oil paints be if the weight per can remained the same and there were 6 cans in the box?

1 can = 2.25 pounds

6 cans in 1 box = 13.5 pounds