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SDE Chapter 3 Mid Quiz

Total questions: 16

Worksheet time: 4hrs 0mins

Name
Class
Date
1.

Estimate the sum or difference.

741.26 + 103.75

a)

650

b)

750

c)

840

d)

740

2.

Estimate the sum or difference.

89.5 - 41.8

a)

50

b)

130

c)

47.7

d)

130.3

3.

Estimate the sum or difference.

13.47 - 9.82

a)

3.65

b)

23.29

c)

3

d)

23

4.

Estimate the sum or difference.

64.952 + 17.513

a)

40

b)

80

c)

82.465

d)

47.439

5.

THIS QUESTION HAS MULTIPLE ANSWERS. CHOOSE ALL CORRECT ANSWERS.

Descartes estimates a difference by rounding each number to the nearest whole number. His estimate is 6. Which problems could he have estimated?

a)

97.5 - 91.8

b)

10.3 - 4.6

c)

23.7 - 18.1

d)

7.2 - 0.8

6.

Find the sum or difference.

0.27 + 0.19

(a)  

7.

Find the sum or difference.

2.52 - 1.36

(a)  

8.

Find the sum.

10.36 + 0.29

(a)  

9.

Find the sum.

461.2 + 78.5

(a)  

10.

Find the sum.

97.65 + 23.08

(a)  

11.

Find the sum.

63.397 + 4.052

(a)  

12.

Find the difference.

86.5 - 49.4

(a)  

13.

Find the difference.

37.82 - 5.07

(a)  

14.

Find the difference.

582.58 - 33.21

(a)  

15.

Find the difference.

99.764 - 8.593

(a)  

16.

Your friend and your cousin complete an agility test. Your friend completes it in 19.1 seconds. Your cousin completes it in 18.7 seconds. How much faster does the winner complete it?

(a)