Grade 4 - Progress in Mathematics

Update your skills. See page 15.

Customary Units of Capacity

6-4

The customary units for measuring

capacity are cup, pint, quart, and gallon.

Each unit can be measured

in fluid ounces (fl oz).

8 fluid ounces is equal to 1 cup.

How many fluid ounces are

equal to 3 pints?

To find how many fluid ounces,

rename pints as cups. Then rename

cups as fluid ounces.

3 pt
 fl oz

3 pt
(3 2 ) c

3 pt
6 c

3 pt
(6 8 ) fl oz

3 pt
48 fl oz

48 fluid ounces are equal to 3 pints.

How many cups are equal to 16 fluid ounces?

To find how many cups, rename fluid ounces as cups.

16 fl oz
 c

16 fl oz
(16 8 ) c

16 fl oz
2 c

2 cups are equal to 16 fluid ounces.

Study this example.

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Customary Units of Capacity

8 fluid ounces (fl oz)
1 cup (c)

2 cups
1 pint (pt)

2 pints
1 quart (qt)

4 quarts
1 gallon (gal)

Think

1 pt
 2 c

1 c
 8 fl oz

Think

1 c
 8 fl oz

Remember: Multiply to

rename larger units as

smaller units.

Divide to rename smaller

units as larger units.

remaining fluid ounces

42 fl oz
 c 5 R2

8 
 4  2 

42 fl oz
5 c 2 fl oz

 40

2

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