The US Customary System of Measurement AND CONVERSIONS
Measurements A measurement includes a number and a unit.
Length The U.S. Customary System units of length are Inch (in) Foot (ft) Yard (yd) Mile (mi) The following measurements are equivalent 12 in = 1 ft 3 ft = 1 yd 5280 ft = 1 mile 1760 yd = 1 mile
Weight Weight is a measure of how strongly gravity is pulling on an object (decreases as elevation increases) The U.S. Customary System units of weight are Ounce (oz) Pound (lb) ton The following measurements are equivalent: 16 oz = 1 lb 2000 lb = 1 ton
Capacity Liquid substances are measured in units of capacity. The U.S. Customary System units of capacity are Fluid ounces (fl oz) Cups (C) Pints (pt) Quarts (qt) Gallons (gal) The following measurements are equivalent: 8 fl oz = 1 C 2 C = 1 pt 2 pt = 1 qt 4 qt = 1 gal
Land of gallon
Gallon Man
Equivalences Units of Weight Units of Capacity Units of Length 16 oz = 1 lb 2000 lb = 1 ton Units of Capacity 8 fl oz = 1 C 2 C = 1 pt 2 pt = 1 qt 4 qt = 1 gal Units of Length 12 in = 1 ft 3 ft = 1 yd 5280 ft = 1 mi Units of Area 144 sq in = 1 sq ft 9 sq ft = 1 sq yd 640 acres = 1 sq mi
Ex: Convert 14 ft to yds (leave your answer in fraction form) Write the original measurement as a unit fraction Multiply the unit fraction by a magic one – the form of which is dictated by the units the numerator unit is the unit you want the denominator unit is the unit you want to eliminate Write your answer in the specified form (fraction form)
Ex: Convert 14 ft to yds
Ex: Convert 7920 ft to mi (leave your answer in fraction form) Write the original measurement as a unit fraction Multiply the unit fraction by a magic one – the form of which is dictated by the units the numerator unit is the unit you want the denominator unit is the unit you want to eliminate Write your answer in the specified form (fraction form)
Ex: Convert 7920 ft to mi
Ex: Convert 3 lbs to oz Write the original measurement as a unit fraction Multiply the unit fraction by a magic one – the form of which is dictated by the units the numerator unit is the unit you want the denominator unit is the unit you want to eliminate Write your answer in the specified form
Ex: Convert 3 lbs to oz = 48 oz
Ex: Convert 2 ¼ gal to qt Write the original measurement as a unit fraction Multiply the unit fraction by a magic one – the form of which is dictated by the units the numerator unit is the unit you want the denominator unit is the unit you want to eliminate Write your answer in the specified form
Ex: Convert 2 ¼ gal to qt
Ex: Convert 17 C to qt (write your answer in fraction form) Write the original measurement as a unit fraction Multiply the unit fraction by a magic one – the form of which is dictated by the units the numerator unit is the unit you want the denominator unit is the unit you want to eliminate Write your answer in the specified form (fraction form)
Ex: Convert 17 C to qt
Ex: At a nursing staff meeting, 60 nurses are expected to attend Ex: At a nursing staff meeting, 60 nurses are expected to attend. Each nurse is expected to drink 2 C of coffee. The industrial size coffee maker brews coffee in gallons. How many gallons of coffee should be prepared for the staff meeting? How many cups of coffee is needed? What should we do?
Is there a direct equivalence between C and gallons? We can use several equivalences stepping up to gallons Cups Pints Quarts Gallons
More Practice Convert 25 yds to feet Write the original measurement as a unit fraction Multiply the unit fraction by a magic one – the form of which is dictated by the units the numerator unit is the unit you want the denominator unit is the unit you want to eliminate Write your answer in the specified form
Ex: Convert 25 yds to feet = 75 ft
Even More Practice Ex: Convert 60 in into ft Write the original measurement as a unit fraction Multiply the unit fraction by a magic one – the form of which is dictated by the units the numerator unit is the unit you want the denominator unit is the unit you want to eliminate Write your answer in the specified form
Ex: Convert 60 in into ft = 5 ft