CH 221 – Ziegler
Worksheet
Significant Figures and Conversions
1. How many significant figures are there in each of the following numbers?
a. 27
b. 2700
c. 2700.
d. 2700.0
e. 2.7 x 103
f. 2.70 x 103
g. 2.700 x 103
h. .524
i. .0524
j. 0.0524
k. 0.05240
l. 5.24 x 10-1
m. 5.24 x 10-2
n. 5.240 x 10-2
2. Give the result of each of the following calculations in the correct number of
significant figures.
a. 124.0 x 2.4 =
b. 1.240 x 102 x 2.4 =
c. 1.70
3.400 =
d. 83 + 55 + 72 =
e. 83 + 55.89 + 72 =
f. 123.4 + 0.06 + 100.0 =
g. 123.4 - 0.06 + 100.0 =
h. 1.234 x 101 + 6 x 10-3 – 1.0 x 101 =
Over…
