Significant Digits    Answers
Practice Problems Level 1
1.  How many significant digits are there in each of the following measurement?
a.   23 cm
f.    32.8 m
b.  1.498 cm
g.   107 mm
c.   248.3 s
h.   0.238 km
d.   9.855 mL
i.    8.0335 cm
e.   76.414 kg
j.    0.05587 m


2.  Express the answer to each of the following calculations with the correct number of significant digits.
a.   3.42 cm + 8.13 cm
f.   3.882 g - 2.114 g
b.   4.939 g + 3.822 g
g.   4.894 cm - 2.33 cm
c.   17.8 cm + 12.11 cm
h.   15.6674 m - 12.838 m
d.   4.552 kg + 3.14 kg
i.    11.22 g - 8.8 g
e.   1.966 s + 3.4422 s
j.    133 L - 6.45 L


3.  Express the answer to each of the following calculations with the correct number of significant digits.
a.   1.2 cm X 1.3 cm
f.   32.88 m2 ÷  4.388 m
b.   2.1 m X 1.8 m
g.   16.5 km2  ÷  1.8 km
c.   1.45 m X 2.2 m
h.    84.99 m2  ÷  2.632 m
d.   2.5 mm X 1.22 mm
i.     9.9 mm2  ÷  3.4484 mm
e.   4.3324 km X 1.2 km
j.     3.085 cm ÷ 2.77448 cm