Unit Form (answer as decimal)
Adding Decimals
Subtracting Decimals
Multiplying Decimals
Estimating
100

4 hundreths + 8 hundreths

.12

100

1.1 + 2.2

3.3

100

9.5 - 4.2

5.3

100

0.3 x 7

2.1

100

8.2 x 2

About 16

200

2 tens 3 tenths  + 1 ten 5 tenths

30.8

200

2.40 + 1.8

3.20

200

191.49 - 10.72

180.77

200

3.12 x 7

21.84

200

3.12 x 7

About 21

300

4 thousandths x 3

.012

300

56.04 + 3.07

59.11

300

91.49 - 0.7

90.79

300

20.075 x 4

80.300

300

20.075 x 4

About 80

400

6 ones 7 tenths - 2.3

4.4

400

72.564 + 5.137

77.701

400

7.148 - 0.07

7.078

400

4.65 x 3

13.95

400

23.6 x 9

About 207 to 216

500

5 - 16 tenths

3.4

500

75.604 + 22.296

97.900

500

361.31 - 2.841

358.469

500

9.63 x 9

86.67

500

9.63 x 9

About 81 to 90

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