Power 10 Multiply
Power 10 Divide
Estimate Divide
Add/Subtract
Multiply
100

3.64 x 10

36.4

100

64.3/10

6.43

100

Estimate:

5.1/1.1

About 5

100

3.5 + 2

5.5

100

0.5 x 4

2

200

4.761 x 100

476.1

200

54678/1000

54.678

200

Estimate:

44.27/11

About 4

200

8.1 - 6.3

1.8

200

80 x 0.7

56

300

536.7 x 10

5367

300

6.03/10

0.603

300

Estimate:

15.64/3

About 5

300

5 + 0.6 + 26.08

31.68

300

142 x 0.3

42.6

400

0.09 x 104

900

400

15/100

0.15

400

Estimate:

89.03/9.4

About 10

400

20 - 9.41

10.59

400

32 x 0.2

6.4

500

0.409 x 104

4,090

500

0.0456/100

0.000456

500

Estimate:

23.28/7.8

About 3

500

100 - (40 + 5.49 + 10.99)

43.52

500

1.2 x 5.5

6.6