Name__________________________________
Date__________________________Pd______
Practice Worksheet for Significant Figures
1. State the number of significant digits in each measurement.
1)
2804 m
___
2)
2.84 km
____
3)
5.029 m
____
4.6 x 105 m
____
6)
4.06 x 10-5 m
____
75,000 m
____
4)
0.003068 m
____
5)
7)
750 m
___
8) 75 m
_____
9)
___
11) 75,000.0 m
____
12) 10 cm
10)
75.00 m
____
2. Round the following numbers as indicated:
To three significant figures:
3.682417
21.860051
__________
__________
To one decimal place:
37,455.6523
___________
1012.511
__________
45.4673
____________
1.3511
2.473
_________
__________
To two decimal places:
5.687524
__________
7.555
___________
8.235
__________
22.494
_________
0.03062
__________
3.4125
_________
41.86632
__________
79.2588
__________
3. Solve the following problems and report answers with appropriate number of significant
digits.
1)
6.201 cm + 7.4 cm + 0.68 cm +12.0 cm = _____________
2)
1.6 km + 1.62 m +1200 cm =
____________
3)
8.264 g - 7.8 g =
4)
10.4168 m - 6.0 m =
______________
5)
12.00 m+15.001 kg=
_____________
6)
1.31 cm x 2.3 cm = _____________
7)
5.7621 m x 6.201 m = ______________
______________
8)
20.2 cm ÷ 7.41 s =
_____________
9)
40.002 g ÷ 13.000005 g = ___________
1. 39.64 + 1.3 =
2. 195.4 - 193 =
3. 584.65 + 1200 =
4. 900 + 500 =
5. 46.8  41.4 
6.
3.84 x 21.69
=
2.9 x 1.63
7.
23.5 - 21.3
=
1.58
8.
4.83
=
2.4 + 9.8
9. The following are placed in a beaker weighing 39.457 g:
2.689 g of NaCl, 1.26 g of sand and 5.0 g water
What is the final mass of the beaker?
10.If the beaker containing a sample of alcohol weighs 49.8767 g and
the empty beaker weighs 49.214 g, what is the weight of the alcohol?
1) Estimate the number of significant figures in each of the following measurements. Write the
measurement using Scientific Notation.
Example: 1025 m
Measurement
4 significant figures
How many significant figures?
1.025 x 103 m
Measurement in Scientific Notation
A) 10046 m
B) 500 m
C) 500. M
D) 510 m
E) .0500 m
F) 10.06 m
G) 10.0060 m
H) .005607 m
I) 12,000 m
2) Round each of the measurements off to 3 significant figures. Write your answer in decimal notation
and scientific notation.
Measurement
A) 7534 liters
B) .002346 mL
C) 16.18 cm
D) 1504 mL
Decimal Notation
Scientific Notation