1. The Customary System
Lesson 5-7

2. The Customary System
The customary system of measurement was established in Today, it is still used by the United States and some other countries. Unlike the metric system, the customary system does not use a base unit and prefixes. Each unit has a separate name.

3. The Customary System

4. Identifying Units
Determine which unit you are measuring (length, weight, or capacity)
Choose the most appropriate unit within that measure.
Be careful: ounces measure WEIGHT, but fluid ounces measure CAPACITY.

5. You can describe 128 ounces of juice as 16 cups, 8 pints, 4 quarts, or 1 gallon. Usually the most appropriate name is the e one with the smallest number!!
Quantity
Measurement
Less Helpful Measurement
Weight of a person
160 pounds
2,560 ounces
Distance from home to school
About 1 mile
About 63,360 inches

6. Choosing A Unit of Length
Flagpoles Choose an appropriate customary unit of measure to describe the height of a flagpole
The unit “mile” is too large and the unit “inches” is too small. Use feet or yards.

7. Choosing A Unit of Weight
Ice What customary unit describes the weight of a bag of ice?
The customary units that describe weight are ounces, pounds, and tons. The weight of a bag of ice is best described in pounds.

8. Choosing A Unit of Capacity
Beverages Choose the appropriate customary unit of measure to describe the amount of lemonade in a pitcher.
The customary units that describe capacity are fluid ounces, cups, pints, quarts, and gallons. The capacity of a pitcher is best described in quarts.