ANSWER KEY
English Units Exercise
Measurement
Example
A.
B.
C.
D.
E.
F.
Fractional Notation
4" + 3/4" + 0.5/16"
1/4" + 1/8" + 1/16" + 0.3/16"
3/4" + 1/8" + 1/16" + 0.3/16"
1" + 1/2" + 1/16" + 0/16"
2" + 0.6/16"
4" + 0.6/16"
4" + 1/2" + 1/8" + 0.5/16"
Decimal
Value
4.78"
0.39"
0.96"
1.56"
2.04"
4.00"
4.66"
Significant
Figures
3
2
2
3
3
3
3
Place of
Doubtful Digit
0.0X
0.0X
0.0X
0.0X
0.0X
0.0X
0.0X
Metric Units Exercise
Measurement
Example
G.
H.
I.
J.
K.
L.
Value
cm
5.58
0.65
2.00
3.49
10.00
11.26
13.61
mm
55.8
6.5
20.0
34.9
100.0
112.6
136.1
Calculation Exercise
English Units
Number Place of
Calculation Answer
of Sig. Doubtful
Figs
Digit
F−E
0.66 in
2
0.0X
2
F×E
18.6 in
3
0.X
D + E + F 10.70 in
4
0.0X
C−A
1.17 in
3
0.0X
C/A
4.0
2
0.X
D/F
0.438
3
0.00X
Significant Figures
cm
mm
3
3
2
2
3
3
3
3
4
4
4
4
4
4
Place of Doubtful Digit
cm
mm
0.0X
0.X
0.0X
0.X
0.0X
0.X
0.0X
0.X
0.0X
0.X
0.0X
0.X
0.0X
0.X
Metric Units
Number Place of
Calculation Answer
of Sig. Doubtful
Figs
Digit
L−K
2.35 cm
3
0.0X
2
I×J
34.9 cm
3
0.X
G/H
0.33
2
0.0X
3
3
X
K
1428 cm
4
(K – J) / H 0.60
2
0.0X
I/J
0.349
3
0.00X