Lesson 14 Weight and Capacity Measurements
Let’s solve problems about weight and capacity.
Warm-up Number Talk: Lots of Thousands
Find the value of each expression mentally.
Activity 1 Milk and Mango Lassi
Problem 1
Here are three true statements about this jug of milk.
This jug contains 1 gallon of milk.
This jug contains 4 quarts of milk.
This jug contains 16 cups of milk.
Complete each statement so that it is true:
One gallon is times as much as 1 quart.
One gallon is times as much as 1 cup.
One quart is times as much as 1 cup.
Problem 2
For a potluck party, Priya and three other relatives are bringing mango lassi.
guest | amount of lassi |
---|---|
Priya | 10 cups |
Uncle | 3 quarts |
Cousin | 8 cups |
Grandma | 2 gallons |
Who prepared the most mango lassi? Explain or show your reasoning.
How many cups of lassi did all the guests bring?
Complete this sentence: Priya’s grandma made times as much lassi as Priya’s cousin. Show how you know.
Activity 2 Clay for Art Class
Problem 1
At a craft store, clay is sold in packs of different sizes: 1 pound, 24 ounces, 3 pounds, and 5 pounds.
An art teacher needs 120 ounces of clay for her class.
Would she have enough clay if she bought each of the following combinations? Explain or show your reasoning.
1-pound pack
24-ounce pack
3-pound pack
5-pound pack
Combo A
Combo B
Combo C
Problem 2
Decide if each statement is true or false. Be prepared to explain or show your reasoning.
A 3-pound pack weighs 2 times as much as a 24-ounce pack.
If we combine a 1-pound pack, a 3-pound pack, and a 5-pound pack, we’d have 6 times as much clay as what’s in a 24-ounce pack.
Practice Problems
Problem 1
Jada’s class drank 2 gallons of milk at lunch. How many cups is that?
The third graders at Jada’s school drank 3 times as much milk as Jada’s class. How many quarts is that?
Problem 2
A rectangle has perimeter 19 cm. One side is 4 cm. How long is the other side of the rectangle?
A square has perimeter 19 cm. How long is each side of the square? Explain or show your reasoning.