Introduction
Ever wonder how your parents know how much to tip at a restaurant? Or those shoes you have been wanting for a 30 % discount? What about the total of your new IPhone with tax? You will have to understand basic operations for determining new totals.
Task
Each student will get a number between 1 and 3.
Once you are given a number you will need to find the group with your number.
Once you are in your group, I will pass out a card letting you know what station your group will start at.
You will be working at stations with receipts to stores or restaurants and discount ads.
Process
First you will need to review notes on lesson:
http://www.amby.com/educate/math/4-2_prop.html
1. Get into your station
2. Read the written scenario
3. Find the tax, discount, or tip
4. Find the new total
5. Record on sheet of paper
6. Timer: 5 minutes
7. Move to the next station (next number, ex: if you started at 2, move to 3)
Resources:
Name: Date: Class Period:
Find the total cost to the nearest cent.
- $2.99 ice cream; 5.5% tax
- $45 dinner; 20% tip
- 19.99 Headphones; 6.75% tax
- $89 pair of jeans; 4.3% tax
- $20.50 lunch; 15% tip
- $25 Hair cut; 10% tip
- $75 dress; 20% discount
- $368 TV; 15% discount
- $13 toy; 50% discount
- $52 tie; 35% discount
- BONUS: $856 refrigerator; 25% discount; 6.3% tax
Evaluation
1. Were proportions set up correctly
2. Were answers error free
Conclusion
Take a few minutes to write down three businesses that use tax, discount and tip. Now, create three real world problems based on what you learned in this lesson.
Teacher Page
http://www.cpalms.org/Public/PreviewResourceLesson/Preview/44893
MAFS.7.RP.1.3
Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.