Customary Units of Weight

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Customary Units of Weight
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How much does an object weigh?

• In the customary system, ounces (oz) and pounds
  (lb) are used to measure weight.

Ten pennies weigh about 1 ounce
One hundred sixty pennies weigh about a pound
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Customary Units of Weight Ounces

• Some items that we measure in ounces are

Tennis Ball
Screwdriver
Beach Ball
3 oz
3 oz
3 oz
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Customary Units of Weight Ounces

• What other items would we measure in ounces?

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Customary Units of Weight Pounds

• Some items that we measure in pounds are

Bowling ball
Dogs
Mrs. Breakey
Dont you dare ask!
10 lb
75 lb
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Customary Units of Weight Pounds

• What other items would we measure in pounds?

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Equivalency

• 16 oz 1 lb

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Example 1
A 2-pound bag of trail mix contains how many
ounces?
2 lb _____ oz

• 1 lb 16 oz
• 2 x 16 oz 32 oz

A 2-pound bag of trail mix contains 32 ounces.
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Example 2
An 18-ounce bag of popcorn contains how many
pounds and ounces?
18 oz _____ lb _____oz

• 18 oz 16 oz 2 oz
• 18 oz 1 lb 2 oz

An 18-ounce bag of popcorn contains 1 pound 2
ounces.
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Lets Practice Weighing In Ounces!
The item I measured-- My estimation-- Actual weight--
Chapter Book
Math Textbook
Wooden 3-D Shape
Atlas
Glue Stick
Pencil
Fraction Bucket
Social Studies Text
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Lets Practice Weighing In Pounds!
The item I measured-- My estimation-- Actual weight--