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Powers of Ten
Where's the Decimal?
100

12 + 3.5

15.5

100

12 - 3.5

8.5

100

3.4 X 4

13.6

100

6.54 X 103

6540

100

579.3 X 8.29 = 4802397

4802.397

200

2.46 + 8.6

11.06

200

8.6 - 2.46

6.14

200

42 X 1.2

50.4

200

0.895 X 1000

895

200

3.863 X 4.962 = 19168206

19.168206

300

19.5 + 0.8

20.3

300

19.5 - 0.08

19.42

300

3.5 X 3.5

12.25

300

23.9 X 100

23.9

300

52.78 X 4.9 = 2586220

258.6220

This one had a trick zero!

400

0.99 + 0.99

1.98

400

1.99 - 0.001

1.989

400

3.21 X 4.2

13.482

400

46.093 X 101

460.93

400

12.98 X 103 = 1298000

12980.00

500

3.45 + 28.6

32.05

500

28.6 - 3.45

25.15

500

0.5 X 22

11

500

87.375 X 100

8737.5

500

5.89 X 2.428 = 1430092

14.30092