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Customary Units of Measure

Convert between customary units of measure.
by

Jinger Willard

on 14 October 2012

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Transcript of Customary Units of Measure

Customary Units
of Measure Conversions LENGTH inches
feet
yards
miles WEIGHT ounces
grams
pounds
tons CAPACITY ounces
cups
pints
quarts
gallons 12 inches = 1 foot
3 feet = 1 yard
1,720 yards = 1 mile
5,280 feet = 1 mile LENGTH To convert from a smaller unit
to a larger unit

DIVIDE To convert from a larger unit
to a smaller unit

MULTIPLY FIRST ASK YOUR SELF:

Are we changing from larger to smaller units
or
smaller to larger units? We are converting feet to inches.

So that is larger to smaller.

REMEMBER:
Larger to smaller
MULTIPLY! So...

3 feet x 12 inches = 36 inches Why do we multiply when converting
customary units of measure? 100 pennies = 1 dollar

There are 100 pennies in one dollar. The penny is a smaller unit, so we need more of them to equal one of a large unit, the dollar. The same is true when working with length, weight and capacity. We need more of a smaller unit to equal a larger unit. Notice, we are going from FEET to INCHES.
A foot is larger than an inch.
So we need to MULTIPLY by how many inches
there are in a foot.

10 feet x 12 inches = 120 inches Example

John has a rope that is 10 feet long. How long is his rope in inches? 6 feet = ____ inches You try! Why do we divide when
converting customary units of measure? Example

5000 pennies = ____ dollars

We know that there are 100 pennies in one dollar. This is the equivalent unit. If we divide 5000 by 100, we will have the number of dollars.

5000 divided by 100 = 50 dollars The length of my desk is 48 inches. How many feet is this?

Notice we are going from INCHES to FEET, so we need to DIVIDE by the number of inches in a foot.

48 inches divided by 12 = 4 feet Example 18 inches = ____ feet You try! 16 ounce = 1 pound
2,000 pounds = 1 ton Weight 32 ounces = ________ pounds

Do you need to multiply or divide? You try! ounces to pounds
smaller to bigger
DIVIDE
32 divided by 16 =
2 pounds
Capacity THE BIG G
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