Conversion factor
Example: 1 mi ≈ 1.609 km. To convert 10 mi to km, multiply 10 by 1.609 km/mi. The distance is the same; the unit label changes.
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Mistakes
- Adding cm and m without converting.
- Rounding too early in a long chain.
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FAQ
- Why multiply by one?
A conversion written as equal quantities in a fraction equals 1; multiplying by 1 keeps the value.