 |
 |
|
 |
 |
|
 |
| |
Key
Idea
We use special
units to tell how
much liquid a
container will hold. |
| |
Vocabulary
• capacity
• teaspoon
• tablespoon
• fluid ounce
• cup
• pint
• quart
• gallon |
|
 |
Customary
Units of
Capacity |
|
 |
|
| How can
you measure liquid? |
|
|
Capacity
is a measure of an
amount of liquid. Many
different units can be used to
measure capacity. |
A common measuring device
for capacity is a measuring
cup, but many other devices
can be used. |
|
 |
 |
|
|
 |
|
|
 |
|
 |
|
 |
|
 |
 |
 |
|
gal = 10 qt
Think:
1 gal = 4 qt
10 ÷ 4 = 2 R2 |
| 10 qt = 2 gal 2 qt or
2 |
 |
gal |
|
 |
| 4 qt 1 pt =
pt |
Think:
1 qt = 2 pt
(2
x 4) + 1 = 8 + 1
4 qt 1 pt = 9 pt |
|
|
 |
|
You
can add and subtract units of capacity just as you
can add and subtract units of length. |
|
 |
 |
 |
 |
|
 |
 |
 |
Think: 2 c = 1 pt
Add 1 pt to 6 pt. |
|
 |
|
 |
Talk About
It |
|
|
| 1. In
Example A, why is 2 R2 equal to 2 gal 2
qt or |
 |
gal? |
|
| 2. In
Example C, why do you change 5 gal 1 qt
to 4 gal 5 qt? |
3. Reasoning
Which unit (or units) of capacity would
be reasonable
to
measure each capacity? |
| |
a.
milk carton |
b.
medicine bottle |
c.
car’s gas tank |
| |
d.
drinking glass |
e.
thimble |
f.
swimming pool |
|
|
| |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|