Conversion Factors and Unit Cancellation Explained
Learn how to convert units using conversion factors and cancel out old units for accurate results. Step-by-step examples on converting feet to inches, hours to days, miles to kilometers, and more are provided. Understand the method and apply it in various conversion scenarios efficiently.
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Presentation Transcript
Chapter 1.3 Conversion Factors and Unit Cancellation
I- Unit Conversion a) 1 foot = 12 inches 1 foot b) = 1 These are Conversion factors 12 inches Which one you use depends on what you want to do c) 12 inches = 1 1 foot
Steps to converting units 1) Write the number (with units) that you want to convert. 2) Multiply it by a conversion factor, written as a fraction 3) Make sure the OLD units cancel (tells you which way the conversion factor goes) 4) Multiply the numbers on top and divide by the numbers on the bottom.
How many inches in 4.3 feet? 1) Write the number (with units) that you want to convert. 4.3ft 12?? 1?? 4.3ft 2) Multiply it by a conversion factor, written as a fraction
12?? 1?? 3) Make sure the OLD units cancel (tells you which way the conversion factor goes) 4.3ft 4) Multiply the numbers on top and divide by the numbers on the bottom. 4.3 x 12in = 51.6in
Convert 52.8 hours to days 1) Write the number (with units) that you want to convert. 52.8 hrs 1??? 24 ?? 52.8hrs 2) Multiply it by a conversion factor, written as a fraction
1??? 24 ?? 3) Make sure the OLD units cancel (tells you which way the conversion factor goes) 52.8hrs 4) Multiply the numbers on top and divide by the numbers on the bottom. 52.8 24= 2.2 days
How many kilometers are in 2.5 miles? 2.5 miles 1) Write the number (with units) that you want to convert. 2.5 miles X 1.609?? 2) Multiply it by a conversion factor, written as a fraction 1 ????
3) Make sure the OLD units cancel (tells you which way the conversion factor goes) 2.5 miles X 1.609?? 1 ???? 4) Multiply the numbers on top and divide by the numbers on the bottom. 2.5 x 1.609= 4.02 km
