Show:
adding/subtracting decimals
estimating sums and differences
multiplying/dividing decimals
rounding
100

5.4 + 6.9

11.9

100

Estimate the answer. 

81.25 - 23.16

58

100

0.8 x 6

4.8

100

round to the tenths place. 

14.658

14.7

200

52.47 + 13.21

65.68

200

Estimate

5.49 + 5.01 + 5.37

15

200

1.9 x 5

9.5

200

round to the hundreths position.

5.031

5.03

300

74 - 59.29

14.71

300

Estimate

21.56 - 19.01

3

300

3.4 x 9

30.6

300

round to the nearest whole number

 50.4

50

400

Solve if a= 219.6

 12.024 + a

231.624

400

Estimate

39.57 + 20.20

60

400

4.2 x 1,000

4,200

400

round to the ten-thousandths place

0.00042

 

0.0004

500

32 - 2.55

6.45

500

6.6 + 6.521 + 6.012356

18

500

6.8 / 2

3.4

500

round to the ones place

54.23659

54