Significant Figures and Calculations with Significant Figures …

Significant Figures Worksheet

A. Determine the number of significant figures in each of the following numbers.

1) 0.02

6) 5 000.

2) 0.020

7) 6 051.00

3) 501

8) 0.0005

4) 501.0

9) 0.1020

5) 5 000

10)10 001

B. Determine the location of the last significant digit (estimated digit) in each of the following numbers. Place a bar over the digit or circle it.

1) 8040 2) 0.0300

6) 90 100 7) 4.7 x 10-8

3) 699.5 4) 2.000 x 102

8) 10 800 000. 9) 3.01 x 1021

5) 0.90100

10) 0.000410

C. Perform the following operations using a scientific calculator. Provide both the calculator answer as well as the answer rounded according to the rules for significant figures.

Calculation 1 1.35 m x 2.467 m 2 1035 m2 / 42 m 3 12.01 mL + 35.2 mL + 6 mL 4 55.46 g ? 28.9 g 5 0.021 cm x 3.2 cm x 100.1 cm 6 0.15 cm + 1.15 cm + 2.051 cm 7 150 L3 / 4 L 8 505 kg ? 450.25 kg 9 1.252 mm x 0.115 mm x 0.012 mm 10 (1.278 x 103 m2) / (1.4267 x 102 m)

Calculator answer

Rounded Answer (include units)

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