The customary system is the measurement system commonly used in the United States, including: feet, inches, pounds, cups, gallons, etc.

Equivalence

Equivalence

Equivalence is the condition of being equal in value or meaning.

Estimate

Estimate

To estimate is to find an approximate answer that is reasonable or makes sense given the problem.

Metric System

Metric System

The metric system is a system of measurement commonly used outside of the United States. It contains units such as meters, liters, and grams, all in multiples of ten.

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Estimate equivalence between metric units of measurement and customary units of measurement