Decimal Review

Addition of decimals

100

.1 + .3

.4

200

4 + .4

4.4

300

7.1 + .7

7.8

400

7.07 + .7

7.77

500

7 + .007

7.007

Subtraction of decimals

100

.5 - .1

.4

200

1.5-.6

.9

300

3.2 - .02

3.18

400

40.5-1.07

39.43

500

6.02 - 1.1007

4.9193

Multiplication of decimals

100

2 X .1

.2

200

10 X .1

1

300

53 X .02

1.06

400

10.4 X .04

.416

500

.073 X 5.1

.3723

Division of decimals

100

20 ÷ .1

200

200

20 ÷ .01

2000

300

200 ÷ .001

200000

400

7.2 ÷ .009

800

500

4.509 ÷ .003

1503

Exponents

100

4.5  X 10 

45

200

6.7 X 10²

670

300

8.5 X 10³

8500

400

Put in scientific notation 

8377

8.38 X 10³

500

4.5 X 10^-2

.045