CHEM U1 SIGNIFICANT FIGURES WORKSHEET

SIGNIFICANT FIGURES WORKSHEET

Complete the following practice exercises:

1. How many significant figures are in each of these numbers?

a) 0.0021

_____

c) 900.00 _____

e) 125 904.000 _____

b) 347 000

_____

d) 407

f) 1.0012

_____

_____

2. Express each of the numbers from Problem #1 in standard exponential form.

a)

_____

c)

_____

b)

_____

d) _____

e) _____

f)

_____

3. Using scientific notation, express the number 582 000 000 to

a) one significant figure

__________________________

b) two significant figures

__________________________

c) three significant figures __________________________

d) five significant figures

__________________________

e) seven significant figures __________________________

4. Perform the indicated mathematical operation and express each result to

the correct number of significant figures.

a)

9.33 x 4.1 = __________

b) 3.01 x 9.00 = __________

c)

3.894 x 0.06 = __________

d) 2.98 + 8.1 + 5.0214 = _________

e)

9.543 / 3.54 = __________

f)

10.001 / 0.0050 = __________

g)

0.0010 / 20 = __________

h)

79.0000 - 79.000 04 = _______

i)

9.146 + 9.137 = _________

j)

600.0 + 0.000 04 = ________

k)

4.184 x 100.62 x (24.27 - 24.16) = _________

l)

(8.925 - 8.904) / 8.925 = ________

m) (9.04 + 8.23 + 21.954 + 81.0) / 3.1416 = ________

n) (9.2 x 100.65) / (8.321 - 4.026) = ________

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