How Many Millimeters in an Inch? | Converting Inches to Millimeters & Millimeters to Inches
From Math with Mr. J
4 min4th5thMath
Summary
How to convert between measurement units -- within the customary or metric system, like feet to inches or meters to millimeters. Mr. J shows whether to multiply or divide.
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All ages
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Teaching resources
Discussion questions
Converting units means trading one unit for an equal amount of another -- multiply for smaller units, divide for larger.
- When converting to a smaller unit, do you multiply or divide?
- How many inches are in a foot? Centimeters in a meter?
- How does knowing the relationship help you set up the conversion?
Quick work-a-long
Words to know: convert, unit, customary, metric
- Convert 3 feet to inches.
- Convert 2,000 grams to kilograms.