Decimals

Adding Decimals

100

1.2 + 2.3=?

3.5

200

5.8 + 2.3=?

8.1

300

9 + 7.91=?

16.91

400

3.21 + 8.2=?

11.41

500

3.05 + 2.8 + 2.768=?

8.618

Subtracting Decimals

100

3.2 - 1.2=?

2

200

10.65 - 10.65=?

0

300

8 - 5.31=?

2.69

400

10.67 - 8.09 - 0.43=?

2.15

500

3.099 - 1.76 - 0.23=?

1.109

Rounding Tenth Place

100

6.12

6.1

200

61.732

61.7

300

8.56

8.6

400

9.05

9.1

500

15.9856

16

Subtracting or Adding Rounded Decimals

100

Round the tenth place the solve:

8.81 + 4.98=?

13.8

200

Round the hundredth’s place then solve:

9.023 - 6.984=?

2.04

300

Round to a whole number then solve:

9.8 - 9.8=?

0

400

Round the thousandth’s place then solve:

8.9056 - 8.6034=?

0.303

500

Round the tenths place and solve:

5.45 + 0.01=? 

5.5

Finding the Perimeter

100

Find the perimeter of a square:

W= 5.32ft

L= 7.1ft

24.84 ft

200

Find the perimeter of a triangle (3 sides):

Side= 7.98 inches

23.94 inches

300

Find the perimeter of a pentagon (has 5 sides):

Side= 0.239 centimeters 

1.195 centimeters

400

Find the perimeter of a kite (2 short, 2 long sides):

Short side: 7.89 inches

Long side:14.09 inches

43.96 inches

500

Find the perimeter of a heptagon (7 sides):

Side: 7.0983 meters

49.6881 meters