5th Grade · Measurement & Data
Customary Units
5.MD.A.1
Definition
The U.S. measurement units such as inches, feet, cups, gallons, ounces, and pounds.
Examples
- Length is measured in inches, feet, and yards.
- Weight is measured in ounces and pounds.
Key rule
Customary units are grouped by what they measure: length, capacity, or weight.
Memory hook
The everyday U.S. units — inches, cups, pounds.