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Big Ideas Math: Modeling Real Life, Grade 6
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Big Ideas Math: Modeling Real Life, Grade 6 View details
6. Converting Measures
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Exercise 4 Page 144

Use the conversion factor that 1 mile is roughly equal to 1.61 kilometers.

37.28 miles per hour

Practice makes perfect

Converting between miles (mi) and kilometers (km) will involve using a conversion factor. 1mi/1.61km Multiplying 60km by this conversion factor will convert it to miles.

60 km * 1mi/1.61km
MoveLeftFacToNumOne

a* 1/b= a/b

60km* 1mi/1.61km
CrossCommonFac

Cross out common factors

60km* 1mi/1.61km
SimpQuot

Simplify quotient

60* 1mi/1.61
IdPropMult

Identity Property of Multiplication

60mi/1.61
UseCalc

Use a calculator

37.267080 ... mi
RoundDec

Round to 2 decimal place(s)

≈ 37.28 mi

Because the time units are the same, they will remain the same. Then, 60 kilometers per hour is the same as approximately 37.28 miles per hour.

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arrow_right Try It p.142-144
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Try It 2 (Page 143)
Try It 3 (Page 144)
Try It 4 (Page 144)
arrow_right Self-Assessment for Concepts & Skills p.144
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arrow_right Self-Assessment for Problem Solving p.145
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arrow_right Review & Refresh p.146
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