Lesson 14: Practice Problems
Problem 1
For each problem, explain or show your reasoning.
160 is what percentage of 40?
40 is 160% of what number?
What number is 40% of 160?
Problem 2
A store is having a 20%-off sale on all merchandise. If Mai buys one item and saves $13, what was the original price of her purchase? Explain or show your reasoning.
Problem 3
The original price of a scarf was $16. During a store-closing sale, a shopper saved $12 on the scarf. What percentage discount did she receive? Explain or show your reasoning.
Problem 4
Select all the expressions whose value is larger than 100.
120% of 100
50% of 150
150% of 50
20% of 800
200% of 30
500% of 400
1% of 1,000
Problem 5 From Unit 3 Lesson 8
An ant travels at a constant rate of 30 cm every 2 minutes.
At what pace does the ant travel per centimeter?
At what speed does the ant travel per minute?
Problem 6 From Unit 3 Lesson 4
Is 3
Problem 7 From Unit 3 Lesson 2
Name a unit of measurement that is about the same size as each object.
The distance of a doorknob from the floor is about 1 .
The thickness of a fingernail is about 1 .
The volume of a drop of honey is about 1 .
The weight or mass of a pineapple is about 1 .
The thickness of a picture book is about 1 .
The weight or mass of a buffalo is about 1 .
The volume of a flower vase is about 1 .
The weight or mass of 20 staples is about 1 .
The volume of a melon is about 1 .
The length of a piece of printer paper is about 1 .