1. Day 12 Discounted Books Common Task.notebook February 26, 2013
AIM: Discounted Books Common Task
Do Now
1.) I purchased a shirt for $30 and that was
after a discount of 30% off. What was the
original price?
2.) A shirt at Old Navy is on sale for 30%
off. The original price $30. What is the
price after the discount is applied?
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5. Day 12 Discounted Books Common Task.notebook February 26, 2013
Illustrative Mathematics
7.RP Chess Club
Alignment 1: 7.RP.A.3
There were 24 boys and 20 girls in a chess club last year. This year the
number of boys increased by 25% but the number of girls decreased by
10%. Was there an increase or decrease in overall membership? Find the
overall percent change in membership of the club.
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6. Day 12 Discounted Books Common Task.notebook February 26, 2013
Illustrative Mathematics
7.RP Tax and Tip
Alignment 1: 7.RP.A.3
After eating at your favorite restaurant, you know that the bill before tax is
$52.60 and that the sales tax rate is 8%. You decide to leave a
20% tip for the waiter based on the pre‐tax amount. How much should you
leave for the waiter? How much will the total bill be, including tax and tip?
Show work to support your answers.
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7. Day 12 Discounted Books Common Task.notebook February 26, 2013
Illustrative Mathematics
7.RP Selling Computers
Alignment 1: 7.RP.A.3
The sales team at an electronics store sold 48 computers last month. The
manager at the store wants to encourage the sales team to sell more computers
and is going to give all the sales team members a bonus if the number of
computers sold increases by 30% in the next month. How many computers must
the sales team sell to receive the bonus? Explain your reasoning.
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8. Day 12 Discounted Books Common Task.notebook February 26, 2013
Before You Leave
1.) How tall would you be if your
height increased 20%?
2.) How does that compare with
your partner's answer?
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