Lesson 12: Practice Problems
Problem 1 From Unit 4 Lesson 12
A backpack normally costs $25 but it is on sale for $21. What percentage is the discount?
Problem 2 From Unit 5 Lesson 9
Find each product.
Problem 3
Select all expressions that show
Problem 4 From Unit 4 Lesson 11
Complete each sentence with the word discount, deposit, or withdrawal.
Clare took $20 out of her bank account. She made a .
Kiran used a coupon when he bought a pair of shoes. He got a .
Priya put $20 into her bank account. She made a .
Lin paid less than usual for a pack of gum because it was on sale. She got a .
Problem 5
Here are two stories:
The initial freshman class at a college is 10% smaller than last year’s class. But then during the first week of classes, 20 more students enroll. There are then 830 students in the freshman class.
A store reduces the price of a computer by $20. Then during a 10% off sale, a customer pays $830.
Here are two equations:
Decide which equation represents each story.
Explain why one equation has parentheses and the other doesn’t.
Solve each equation, and explain what the solution means in the situation.