• Unit Conversions use fractions/ratios to change the units of measurement

• We “cross-cancel” units• Units are common factors on top and bottom• Use Formula Sheet

• We keep canceling until we are left with the units we want and then we multiply the fractions

Example: Convert 5 cookies to cookies day week5 cookies 1 day

7 day1 week 35

135

1)7*5(

Cookies per week

Convert ½ hour to minutes1 hour2

60 min 1 hour 30260

)1*2()60*1(

minutes

Convert 15 inches to feet15 in1

1 ft 12 in 4

1145

41

15

121

115

ft÷3

÷3

Convert 64 ounces to pounds64 oz1

1 lb 16 oz 4

11

14

161

164

÷16

÷16

lb

Convert 20 quarts to gallons20 qt1

1 gal 4 qt 5

11

15

41

120

gal

Convert 12 cups to pints

12 cups 1

1 pint2 cups

= 12 2 = 6 pints

Convert 50 inches to yards50 in1

1 ft 12 in

Convert 45 cups to quarts45 cups1

1 pints 2 cups

1 quart 2 pints

1 yd 3 ft

= 50 • 1 • 1 1 • 12 • 3=

5036

=

= 45 • 1 • 1 1 • 2 • 2=

45 4

=

Convert 200 feet per minute to miles per hour200 ft1 min

1 mile 5280 ft

60 min 1 hour =

== 200 • 1 • 60 1 • 5280 • 2

12,00010,560

1.136 miles per hour