Download Significant Figures Practice Worksheet

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Date:__________________ Period:____
Significant Figures Practice Worksheet
How many significant figures do the following numbers have?
1)
1234 _____
11)
0.00030 _____
2)
0.023 _____
12)
1020010 _____
3)
890 _____
13)
780. _____
4)
91010 _____
14)
1000 _____
5)
9010.0 _____
15)
918.010 _____
6)
1090.0010 _____
16)
0.0001 _____
7)
0.00120 _____
17)
0.00390 _____
8)
3.4 x 104 _____
18)
8120 _____
9)
9.0 x 10-3 _____
19)
7.991 x 10-10_____
10)
9.010 x 10-2 _____
20)
72 _____
Rounding Worksheet 1
Round the following numbers to the accuracy of the underlined digit.
For example, 5678 means you round to the nearest ten.
1a.
356.6217
1b.
0.04819
1c.
1.0933
2a.
4.94402
2b.
9.2661
2c.
2.18994
3a.
64.08201
3b.
85.71071
3c.
79.3919
4a.
27.53853
4b.
846.6566
4c.
0.22446
5a.
1.81371
5b.
0.80819
5c.
0.63777
6a.
4.35871
6b.
0.71466
6c.
33.6137
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Significant Figure Calculations
Solve the following mathematical problems such that the answers have the correct
number of significant figures:
1)
334.54 grams + 198 grams = ___________________
2)
34.1 grams / 1.1 mL = ___________________
3)
2.11 x 103 joules / 34 seconds = ___________________
4)
0.0010 meters – 0.11 m = ___________________
5)
349 cm + 1.10 cm + 100 cm = ___________________
6)
450 meters / 114 seconds = ___________________
7)
298.01 kilograms + 34.112 kilograms = ___________________
8)
84 m/s x 31.221 s = ___________________
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Significant Figure Calculations – Answers1
Solve the following mathematical problems such that the answers have the correct
number of significant figures:
1)
334.54 grams + 198 grams = 533 grams (rounded from 532.42 grams)
2)
34.1 grams / 1.1 mL = 31 g/mL (not rounded)
3)
2.11 x 103 joules / 34 seconds = 62 J/s (rounded from 62.0588 J/s)
4)
0.0010 meters – 0.11 m = -0.11 m (rounded from -0.109 m)
5)
349 cm + 1.10 cm + 100 cm = 500 cm (rounded from 450.1 cm)
6)
450 meters / 114 seconds = 3.9 m/s (rounded from 3.9474 m/s)
7)
298.01 kilograms + 34.112 kilograms = 332.12 kg (rounded from 332.122 kg)
8)
84 m/s x 31.221 s = 2600 m (rounded from 2622.564 m)
1
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Solutions to the Significant Figures Practice Worksheet
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5)
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Answer Key for Rounding Worksheet 1
1a.
356.6
1b.
0.05
1c.
1.093
2a.
4.944
2b.
9.2661
2c.
2.2
3a.
64.082
3b.
85.7107
3c.
79.39
4a.
27.5385
4b.
846.66
4c.
0.224
5a.
1.8
5b.
0.808
5c.
0.64
6a.
4.36
6b.
0.715
6c.
33.6137
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