Converting Units with RatesMultiply by a fraction equal to 1 and the units cancel…6th GradeAny conversion is multiplying by a fraction worth exactly 1, arranged so the unwanted unit cancels.1WRITE WHAT YOU HAVEInclude the unit: 5 km.2BUILD A FRACTION WORTH 11000 m / 1 km — top and bottom are the same length.3ARRANGE SO UNITS CANCELPut km on the bottom so it cancels the km you have.4MULTIPLY5 km × 1000 m/km = 5000 m. Only metres survive.WORKED90 km/h → m/s: × 1000 m/km ÷ 3600 s/h = 25 m/s2.5 hours → minutes: 2.5 × 60 min/h = 150 minThis method never needs a memorised direction. The units tell youwhich way up the fraction goes.Converting Units with Rateswww.littleactivity.com

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Math · 6th Grade

Converting Units with Rates

Multiply by a fraction equal to 1 and the units cancel themselves.

How to use it

Write the units into the working. If they do not cancel, the setup is wrong.

Free · print-ready PDF · US Letter and A4

Grade
6th Grade
Ages
11–12
Subject
Math
Pages
1

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