Adding with Decimals
Subtracting with Decimals
Estimate using Decimals
100

0.34+0.34=

0.68

100

0.81-0.78=

0.03

100

Estimate:

4.2+8.9=

13

200

80.01+2.89=

83

200

205.4-99.7=

105.7

200

Estimate, rounding to the nearest thousand:

25,003-12,900=

12,000

300

0.02+0.89=

0.91

300

27-9.9=

17.1

300

Estimate by rounding to the nearest whole number:

22.4-16.2=

6

400

14+700.02+7.6=

721.62

400

598.004-89-0.9=

508.104

400

Round to the nearest tenth and estimate:

501.68+20.112= 

521.8

500

A playhouse has 31 square feet downstairs and 15.15 square feet upstairs. How many total square feet is the playhouse?

46.15 square feet

500

Tori  measured two strings. The green string was 2.37 cm long. The blue string was 4cm long. How many centimeters longer was the blue string than the green string?

1.63 cm

500

Robert ran 25.3 meters on Sunday. He ran another 10.50 meters on Monday. About how many meters did he run altogether? Use estimation

About 27 meters