Stepwise Unit Conversion: Inches to km
1. Start with the original measurement
2. Multiply by conversion fraction
3. Cancel unwanted units each step
4. Convert inches→cm→m→km as example
5. Write factors as fractions
6. Check units cancel across chain
7. Round at end to sig figs
Common Unit Conversion Mistakes
1. Flipping conversion factors incorrectly
2. Confusing metric prefixes like milli/centi/kilo
3. Rounding too early during calculations
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