Section 1
Customary Unit Conversion Factors
Property
A conversion factor is a ratio of two equivalent measurements.
Below are common conversion factors for the customary system.
Length
- foot (ft) inches (in)
- yard (yd) feet (ft)
- mile (mi) feet (ft)
In this Grade 5 Illustrative Mathematics lesson, students solve multi-step problems involving customary length unit conversions between inches, feet, and yards. Unlike metric conversions, these require multiplying and dividing by numbers such as 12 and 3, so students apply prior skills with whole numbers and fractions to convert strategically in both directions. The lesson is part of Chapter 6 on Place Value Patterns and Decimal Operations and addresses standard 5.MD.A.1.
Section 1
Customary Unit Conversion Factors
A conversion factor is a ratio of two equivalent measurements.
Below are common conversion factors for the customary system.
Length
Section 2
Converting Larger Customary Units to Smaller Units
To convert a measurement from a larger customary unit to a smaller one, multiply the number of larger units by the conversion factor.
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Section 1
Customary Unit Conversion Factors
A conversion factor is a ratio of two equivalent measurements.
Below are common conversion factors for the customary system.
Length
Section 2
Converting Larger Customary Units to Smaller Units
To convert a measurement from a larger customary unit to a smaller one, multiply the number of larger units by the conversion factor.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter