Transcript Customary Measurements

CUSTOMARY
MEASUREMENTS
Objective: Students identify and
convert customary units of measure.
CUSTOMARY
MEASUREMENTS
CHOOSING THE APPROPRIATE
CUSTOMARY UNITS
Choose the most appropriate customary unit for
each measurement. Justify your answer.
A.
The length of a rug
Feet-you can use sheets of paper to measure the
length
B.
The weight of a magazine
Ounces-the weight of a magazine is about the
weight of several slices of bread
C.
The capacity of an aquarium
Gallons-you can fill an aquarium with gallon
jugs of water.
COMMON EQUIVALENT
CUSTOMARY UNITS
Length
Capacity
12 inches (in)= 1 foot (ft)
3 feet = 1 yard (yd)
5,280 ft = 1 mile (mi)
8 fluid ounces (fl oz) = 1 cup (c)
2 c = 1 pint (pt)
2 pt = 1 quart (qt)
1,760 yds= 1 mi
4 qt = 1 gallon (gal)
Weight
16 ounces (oz) = 1 pound (lb)
2,000 lbs = 1 ton
TRY THIS!!!
Convert 19 c to fl oz
Method 1: Proportions
Write a proportion
fl oz  8 x

c  1 19
8 19   1x
x  152
Method 2: Multiply by 1
Multiply by a ratio equal to
1 and divide out the units
19c 8 fl oz
19c 

1
1c
19  8 fl oz

1
 152 fl oz
19 cups is equal to 152 fluid ounces
TRY THIS!!!
A carpenter has a wooden post that is 4 ft long.
She cuts off 17 in the end of the post. What is
the remaining length?
First convert 4 ft to in
in  12 x

ft  1 4
x  48
Use 1 ft = 12 in
The carpenter cuts off 17 in.
4 ft  17in  48in  17in  31in
Write answer in both feet and inches
1 ft 31
7


ft
31in
2
ft or 2ft 7in
12in 12
12
Multiply by ratio
equal to 1
EXAMPLE 1:
Choose the most appropriate customary unit for
each measurement. Justify your answer.
A.
The weight of a car
B.
The diameter of a soup can
C.
The weight of a newborn baby
EXAMPLE 2:
Convert 5,000 pounds to tons.
EXAMPLE 3:
Allison orders a 6 oz grilled
chicken sandwich. Joseph orders
a quarter lb grilled chicken
sandwich. Which sandwich
weights more? How much more?