Unit Conversions Q — How many kilometers are

Unit Conversions Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) # km First identify the desired quantity.

Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) 47 mi Next write down the starting quantity… the starting point of calculations.

Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) 47 mi Now we have to choose a conversion factor

Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) 47 mi 1 km 0. 621 mi 1 km What conversion factors are possible?

Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) 47 mi 1 km 0. 621 mi 1 km Pick the one that will allow you to cancel out miles

Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) 47 mi 1 km 0. 621 mi 1 km Pick the one that will allow you to cancel out miles

Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) 47 mi x 1 km 0. 621 mi Cross out common factors

Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) 47 x 1 km 0. 621 = 75. 7 km Now finish the math.

Q - How many kilometers are in 47 miles? (note: 1 km = 0. 621 miles) 47 x 1 km 0. 621 = 75. 7 km The final answer is 75. 7 km

Summary The previous problem was not that hard In other words, you probably could have done it faster using a different method However, for harder problems the factor label method is easiest

More examples 1. You want to buy 100 U. S. dollars. If the exchange rate is 1 Can$ = 0. 65 US$, how much will it cost? 100 US$ x 1 Can$ = 153. 85 Can$ 0. 65 US$

3. There are 12 inches in a foot, 0. 394 inches in a centimeter, and 3 feet in a yard. How many cm are in one yard? 1 yd x 3 ft x 12 in x 1 cm = 91. 37 cm 1 yd 1 ft 0. 394 in