1. Objective: To determine the precision of a measurement. 3.12.3
What operation does the + indicate?
Class Notes Measurement Sec 1.1
Example 1: The distance between two studs in a
house frame must be 18 inches + ½ inch.
If the boards are inches apart would the house pass inspection?
What would be the closest
the two boards
could be together?
What would be the farthest apart the two
boards could be?

2. If the slats are 9.73 cm apart, is the crib in compliance?
Example 2: The slats on a babies cribs must be
9.5 cm apart cm.
If the slats are 9.73 cm apart, is the crib in compliance?
How close together
can they be and still
pass inspection?
How far apart can they be and still pass
inspection?

3. Example 3: A 4 ½ nail must be accurate within
+ one third inch. If a nail is 4 and two-fifths inches,
Will it meet the requirement?

4. 4. Example 4: A 4 inch nail can actually be plus
or minus ¼ inch. Which measurement(s) below
would still be classified as a 4 inch nail?
a. 3 2/5
b. 3 ¾
c. 3 ½
d. 3 2/3
e. 4 1/5
f. 4 ¾
g. 4 1/3
h. 4 2/3