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Worksheets

Calculations with significant figures

Total questions: 20

Worksheet time: 27mins

Name
Class
Date
1.
Calculate 5.50 cm + 5.50 cm and give your answer with the appropriate number of significant figures.
a)
11 cm
b)
11.0 cm
c)
11.00 cm
d)
11.000 cm
2.
How many significant figures will be in the answer to the following question:
7.62 x 6.98 x 3.2645
a)
1
b)
2
c)
3
d)
4
3.
Calculate 12.34 + 1.234 + 0.1234
a)
13.6974
b)
13.697
c)
13.70
d)
13.7
4.
Calculate 345.009 g - 23.009 g and give your answer with the appropriate number of significant figures.
a)
322.00 g
b)
322 g
c)
322.000 g
d)
322
5.

5.40 x 7.90

a)

42.66

b)

42.7

c)

43

d)

40

6.

In division and multiplication, the answer should have the same number of significant figures as the

a)

number in the calculation with the fewest significant figures.

b)

number in the calculation with the most significant figures.

c)

average number of significant figures in the calculation.

d)

total number of significant figures in the calculation.

7.

The dimensions of rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as

a)

4.128 cm3.

b)

4.12 cm3.

c)

4.13 cm3.

d)

4.1 cm3.

8.

Samples with masses of 0.12 g, 1.8 g, and 0.562 g are mixed together. The combined mass of the three samples, expressed to the correct number of significant figures, should be recorded as

a)

2.4 g.

b)

2.48 g.

c)

2.482 g.

d)

2.5 g.

9.

What is the correct answer to: 6.201 cm + 7.4 cm + 0.68 cm +12.0 cm =

a)

26.281

b)

26.28

c)

26.2

d)

26.3

10.

What is the correct answer for: 1.31 cm x 2.3 cm

a)

3.013

b)

3.01

c)

3.02

d)

3.0

11.

Solve and round to the correct number of significant figures.

730 / 1.89

a)

390

b)

386.243

c)

386

d)

386.24

12.
Calculate 923 g ÷ 20312 cm3 and give your answer with the appropriate number of significant figures.
a)
0.04 g/cm3
b)
0.045 g/cm3
c)
0.0454 g/cm3
d)
4 x 10-2 g/cm3
13.

What is the correct answer for this problem:

3.5 cm x 4.21cm =

a)

14.7 cm

b)

14.7 cm2

c)

15 cm

d)

15 cm2

14.
Calculate 12.47 m ÷ 3.2 s and give your answer with the correct number of significant figures.
a)
4 m/s
b)
3.9 m/s
c)
3.90 m/s
d)
3.897 m/s
15.

Complete the following calculations. Round off your answers as needed.

245.01 km x 2.1 km

a)

5.14521 x 102

b)

510

c)

514

d)

514.521

16.

What is the correct answer for: 12.00 m +15.001m =

a)

27.001

b)

27.00

c)

27.0

d)

27

17.

5.9 x 6.01

a)

35.459

b)

35.46

c)

35.5

d)

35

18.

Solve. Round using SigFig math rules.

98.7°C - 97.25°C

a)

1°C

b)

1.5°C

c)

1.45°C

d)

1.450°C

19.

12.34 + 1.234 + 0.1234 =

a)

13.6974

b)

13.697

c)

13.70

d)

13.7

20.

10.0 x 100.0 =

a)

1000

b)

1.000 x 104

c)

100 x 101

d)

1.00 x 103

e)

100.