# Significant Digits Worksheet 2

```Worksheet: Significant Digits, Part 2
Name__________________
Multiplication and DivisionHow many significant digits should the results of these calculations have?
a. (4500)(0.002)(6.9 x 103) ________
b. (3.00 x 10-8)(0.003010)
________
(9.002 107 )(7200)
c.
(0.080)(6.1159 102 )
________
Addition and SubtractionCircle the last column to which these calculated answers will be rounded:
64.800
1005.2
0.0055




26.35

8940

0.01127






0.0028






78.066

0.70
Rounding:
Round to three (3) significant digits:
a. 3.14159 __________
b. 0.002927 __________
c. 23998
__________
d. 124,500 __________
e. 12.98
__________
f. 55.650001 _________
Calculations and Rounding:
Perform these calculations and round to the correct number of significant digits.
a. 791.6 x 52 = __________
b. 98.4 –0.0075 = ___________
c. 852 x 27.0 = ____________
d. 7500 +123.4 –0.06 = _____________
e. (1.50)(1700)(2.0x 10-4)/3.4378 = ____________
Review:
When measurements are accurate, they ____________________________.
When measurements are precise, they _____________________________.
Give the number of significant digits in these measurements:
a. 93,000,000 mi ______
e. 235,000 m ______
b. 404.3 kg ______
f. 0.7070 s ______
c. 0.00303 cm ______
g. 4500.0 m3 ______
d. 0.0027 g ______
h. 4.00 x 10-2 mm _______
PHYSICSFundamentals
&copy; 2004, GPB
1-21
```