DECIMALS

Subtracting decimals

100

When adding decimals, what must you do with the decimal points? 

Line them up 

200

5.6 - 3.5=

2.1

300

97 - 16.98

80.02

400

14.39 - 12.16

2.23

500

58.67 - 28.72=

29.95

Adding decimals

100

When adding decimals, what must you do with the decimal points?

Line them up

200

4.9+3.0=

7.9

300

7.2+9.5=

16.7

400

.796+13

13.796

500

15.63+24.36=

39.99

Multiplying decimals

100

When multiplying decimals (such as 1.2 times 3) how do you know where to put the decimal in your answer?

Add up the number of decimal places in all the factors. 

200

1.7 x 5 =

8.5

300

0.9 x 4 =

3.6

400

2.4 x 8 =

19.2

500

.012 x 7 =

.084

Multiplying decimals again

100

.7 x .4=

.28

200

0.4 x 3.7 =

1.48

300

.52 x 2.1=

1.092

400

1.5 x 2.7 =

4.05

500

.28 x .08 =

.0224

Dividing decimals

100

TRUE OR FALSE?

When dividing a decimal by a decimal, you must move the decimal point in the divisor and the dividend the same number of spaces. 

True

200

182 ÷ 7=

26

300

ESTIMATE  32.7 ÷ 3.1 = 

11

400

36.8 ÷ 2 =

18.4

500

1.44 ÷ .4 = 

3.6