Significant Figures and Rounding Measurements Name
Significant Figures and Rounding Measurements Name ______________
1. Round off each of the following numbers to three significant figures
a. 15.9994 b. 1.0080
c. 0.6654 d. 4885
e. 87,550 f. 0.027225
2. Put the following numbers into scientific notation and write down the number of
significant digits in each:
a. 0.225 b. 2.5
c. 44,163 d. 20,190
e. 0.00000000000991 f. 7,000
3. How many significant figures are in each of the following numbers?
a. 225.0 b. 1000.0
c. 0.0003210 d. 0.0067
e. 1,000,000. f. 2.00001
4. Perform the indicated arithmetic operations, and round the results to the appropriate
number of significant digits.
a. 77.981 x 2.33 = ____________
b. 4 x 0.0665 = ____________
c. 17.34 + 4.900 + 23.1 = ____________
d. 9.80 – 4.762 = ____________
e. 3.9 X 6.05 X 420 = ____________
f. 14.1 / 5 = ____________
g. 1001 + 16.23 = ____________
h. 424.5 + 2.8461 = ____________
i. 9.9 – 9.54 = ____________
j. 7.3778 – 0.000265 = ____________
k. 8.561 x 109 – 6.21 x 1010 = ____________
l. (24.358)(6.4) = ____________
m. 48.6(0.6959) = ____________
n. 23081 / 0.8981 = ____________
o. (6.082⋅1023)(5.0⋅10-3) = ____________
p. (9.9⋅104) + (1.273 ⋅102) = ____________
5. Express the following fractions in decimal from to 2 significant digits.
a. ¼ b. 2/3
c. 5/3 d. 13/5
6. A container holds 32.8 qt of water. The following portions of water are then added to the container: 0.12 qt, 3.7 qt, and 1.266 qt. What is the new volume of water in the
container?
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