number base 10

adding decimals

100

0.75 + 5.054

5.804

200

22.9 + 33.9 

56.8

300

52.17 + 23.22

75.39

400

120.021 + 450.054

570.075

500

5,698.534 + 3,489.75 + 4.5

9,192.784

subtacting decimals

100

2.36 - 1.25

1.11

200

4.25 - 2.63

1.62

300

24.4 - 12.4

12

400

572.767 - 555.555

17.212

500

7,654.32 - 6,543.21

1,111.11

multiplying decimals

100

5.34 x 1.22

5.68

200

7.21 x 2.23

14.43

300

22.0022 x 17.0478

34.0156

400

457.235 x 222.222

914.470

500

4,456.5 x 2,345.2

9431.0