19.4 Compare Customary Units of Liquid Measurement

19.4 Compare Customary Units of Liquid Measurement

I can represent and compare different customary units of liquid volume.

Let's spark our learning

At a dairy farm, Jenny pours milk into smaller containers. She pours milk from a full gallon container to fill cup-size containers. She then pours milk from another full gallon container to fill pint-size containers.

Poll

Do you think Jenny fills more cups or pints of milk?

• pints

• cups

Jenny fills more cups!

Because a cup is smaller than a pint, Jenny fills more cup-size containers than pint-size containers.

What is volume?

• Liquid volume is the measure of the space a liquid occupies.

• Customary units for measuring liquid volume are gallons, quarts, pints, cups, and fluid ounces (fl oz).

• Gallons are also written as gal

• Quarts are written as qt

• Pints are written as pt

• Cups are written as c

Problem 1

The size of a drink container depends on the amount of liquid it needs to contain. The grocery store sells drinks in gallons, quarts, pints, and cups. There are 2 cups in 1 pint, 2 pints in 1 quart, and 4 quarts in 1 gallon. How does the amount of liquid in a gallon compare to the amount of liquid in each smaller-sized container?

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Multiple Choice

There are 8 ounces in a cup. What number of fluid ounces are in 1 gallon?

• 64

• 96

• 128

There are 8 fluid ounces in 1 cup, and there are 16 cups in 1 gallon.

8 × 16 = 128

There are 128 fluid ounces in 1 gallon.

Problem 2

Tye needs 65 cups of apple juice to serve at a party. Apple juice is sold in gallon containers. How many gallons should Tye buy?

Help me finish this table

• 1 gallon = 16 cups

• 2 gallons = 32 cups

• 3 gallons = 48 cups

• 4 gallons = 64 cups

• 5 gallons = 80 cups

Multiple Choice

If Tye needs 65 cups of Apple Juice, how many gallons should he buy?

• 3

• 4

• 5

Problem 3

Amber uses 3 quarts of iced tea and 4 cups of lemonade to make an iced tea lemonade drink. Compare the amounts of iced tea and lemonade.

Multiple Choice

Find the number of cups in 3 quarts.

• 4

• 8

• 12

• 16

Multiple Choice

3 quarts ____ 4 cups

• >

• <

• =

So what did we learn?

Amber uses 3 quarts, or 12 cups, of iced tea and only 4 cups of lemonade. Therefore, Amber uses more iced tea than lemonade