5-5
Pre-Algebra
Using Customary Units of Measurement
Objectives: 1.
2.
OBJECTIVE
1
Identifying Appropriate Units of Measure
In order to measure an object, you should choose an
of measure.
EXAMPLE 1
Choosing a Unit of Measure
Choose an appropriate unit of measure. Explain your choice.
1. weight of a truck
2. length of a hallway rug
3. length of a swimming pool
4. weight of a baby
5. length of a pencil
6. capacity of an eyedropper
7. weight of a hummingbird
8. length of a soccer field
OBJECTIVE
2
Converting Customary Units
You can use
to change from unit of
measure to another in a process called
.
You use equivalent units to write a conversion factor. For example,
so you can use
EXAMPLE 2
to convert from feet to inches.
Using Dimensional Analysis
Use dimensional analysis to convert the following.
1. 10 quarts to gallons
STEPS
1. Use a conversion factor that changes quarts to gallons
2. Divide the common factors and units.
3. Simplify
4. Write as a mixed number
2. 14 oz =
lb
3. 14 in =
ft
= 1.
4. 14 pt =
qt
5. 68 fl oz =
c
6. 3 ½ lb =
oz
7. 3 ½ yd =
ft
8. 3 ½ pt =
c
9. 1,000 oz =
lb
Pre-Algebra Objectives 5.5
The student should be able….
1. To identify appropriate customary units.
2. To convert customary units.