Math Topic 2 Review

Adding Decimals

100

2.35 + 6.28

8.63

200

12.34 + 67.5

79.84

300

9.2 + 12.3

21.5

400

94.81 + 7.32

102.13

500

2.7 + 36.19

38.89

Subtracting Decimals

100

9.8 - 3.9

5.9

200

12.5 - 7.4

5.1

300

32.9 - _____ = 26.1

6.8

400

20.00 - 8.95

11.05

500

19.05 - ______ = 4.9

14.15

Word Problems

100

Isabella buys 3.4 pounds of apples, 5.2 pounds of peaches, and 8.8 pounds of oranges. How many pounds of fruit does she buy in total?

17.4 pounds

200

Romina ran 15.7 seconds in the first round of the 100 yard dash. In the second round she ran 14.2 seconds. How much faster did she run in the second round?

1.5 seconds faster

300

Brian is hosting a Phillies watch party tonight. In preparation, he bought $45.23 worth of steak and $123.89 worth of chicken. How much money did he spend in all?

$169.12

400

Mrs. Ritucci drove 37.8 miles on Saturday, 89.23 miles on Sunday, and 12.6 miles on Monday. How much farther did she drive on Sunday than she did on Monday?

76.63 miles farther

500

One length of a square shaped backyard is 15.7 feet in length. Round the length to the nearest whole number and find the perimeter.

64 ft. 

Estimating

100

Estimate the sum of 3.4 and 9.9 by rounding each number to the nearest whole number

13

200

Estimate the difference of 16.4 and 6.5 by rounding each number to the nearest whole number

9

300

Estimate the sum of 12.37 and 37.81 by rounding each number to the nearest tenth

50.2

400

How much more is 88.51 than 12.19 when each number is rounded to the nearest tenth?

76.3

500

Estimate the sum of 45.98 and 31.29 by rounding each number to the nearest whole number

77