Estimate Sums & Differences
Rounding
Add Decimals
Subtract Decimals
Other
100

Write an estimated equation for:

56.24 + 8.98

56 + 9 = 65

100

If a rectangle has a width of 55.2 and a length of 38.9, write an expression rounding the PERIMETER to the nearest whole number.

55 + 55 + 39 + 39

100

3.23 + 9.19

12.42

100

45.23 - 12.11

33.12

100

Draw a bar diagram with a sum for:

23.8 + 34.08

57.88

200

Write an estimated equation for:

13.62 + 89.02

14 + 90 = 104

200

If a rectangle has a width of 12.73 and a length of 43.82, write an expression rounding the PERIMETER to the nearest tenth.

12.7 + 12.7 + 43.8 + 43.8

200

18.9 + 28.7

47.6

200

42.8 - 27.12

15.68

200

How do you find perimeter?

Add all the sides of the figure.

300

Write an expression rounding to the nearest tenth:

34.39  + 15.09

34.4 + 15.1

300

If a rectangle has a width of 72 and a length of 12, what is the perimeter?

72 + 72 + 12 + 12 = 168

300

5.02 + 2.58

7.6

300

78.07 - 42.9

35.17

300

What's the perimeter of a rectangle whose sides are:

27.13 and 56.8

167.86

400
Write an estimated equation for:

102.9 + 39.01

100 + 40 = 140

400

If a rectangle has a width of 51.18 and a length of 38.02, find the PERIMETER rounding to the nearest tenth.

51.2 + 51.2 + 38 + 38 = 178.4

400

57.8 + 63.02

120.82

400

48.6 - 17.54

31.06

400

Write an equation to find the PERIMETER rounding the length and width to nearest whole number if the dimensions are:

length:  48.9 

width: 41.89

49 + 49 + 42 + 42 = 182

500

Write an expression rounding to the nearest whole number for:

129.19 + 38.78

129 + 39

500

Find the PERIMTER of a rectangle if the width is 62.3 and the length is 23.39.

62.3 + 62.3 + 23.39 + 23.39 = 171.38

500

75.01 + 34.8

109.81

500

66.7 - 39.64

27.06

500

Write an equation finding the PERIMETER rounding the width and length of a rectangular figure to the nearest tenth:

width:  28.19

length:  86.49

28.2 + 28.2 + 86.5 + 86.5 = 229.4