Sale Prices: Comparison and Calculation

Dad is comparing laptop prices in different stores, students are learning about reductions using ratio tables, Sue is looking for the best deal on a scooter, and a student's incorrect calculation on a TV sale price is explained using a ratio table. Learn how to compare prices, calculate discounts, and find the best deals.

• Sale Prices
• Comparison
• Ratio Tables
• Discounts
• Deals

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Uploaded on Sep 10, 2024 | 0 Views

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Presentation Transcript

1. Sale Prices Dad wants to buy a laptop for his son for Christmas. He uses the internet to compare the price in various stores. In PC Express the laptop is priced at 479 479, whereas LAP Gear are offering the same laptop for 520 520 with a 12.5% reduction. 12.5% reduction. Dad sketches a ratio table to help him work out the price in LAP Gear. He starts like this: % 100 10 5 2.5 Price 520 Which company sells the laptop cheaper?

2. Sale Prices Draw ratio tables to help you work out Draw ratio tables to help you work out a) The price of a 1500 computer after a 15% reduction b) The price of a 600 dishwasher after a 12% reduction c) The price of a 1250 holiday with 8% off d) The price of a 2500 car with 21% off Now do these in your book Now do these in your book

3. Sale Prices Draw ratio tables to help you work out Draw ratio tables to help you work out a) The price of a 1500 computer after a 15% reduction 1257 1257 b) The price of a 600 dishwasher after a 12% reduction 528 528 c) The price of a 1250 holiday with 8% off 1150 1150 d) The price of a 2500 car with 21% off 1975 1975 Now do these in your book Now do these in your book

4. Sale Prices - challenge Sue is looking to buy a scooter for her daughter. She finds the one she wants on offer in two different on line stores. The offers are as follows: Which store is the cheapest for this scooter?

5. Sale Prices - challenge Sue is looking to buy a scooter for her daughter. She finds the one she wants on offer in two different on line stores. The offers are as follows: Which store is the cheapest for this scooter?

6. Sale Prices - challenge Is it the best deal for any starting price? How do you know?

7. Sale Prices - challenge Is it the best deal for any starting price? How do you know?

8. Find the error Question: In a sale, a television has 25% off. The sale price is 600. What was the price before before the sale? A student says the answer is 750 and explains: If 25% was taken off, then 25% must be added on. 25% of 600 is a quarter of 600, which is 150, so if you add that on, it is 750. The teacher says this is incorrect. Can you use a ratio table to show why it is incorrect, and find the correct answer?

9. Working backwards Draw ratio tables to help you work out Draw ratio tables to help you work out a) reduction is 450 The price of a computer after a 40% b) reduction is 480 The price of a dishwasher after a 20% c) The price of a holiday with 15% off is now 680

10. Working backwards Draw ratio tables to help you work out Draw ratio tables to help you work out a) reduction is 450 The price of a 750 750 computer after a 40% b) reduction is 480 The price of a 600 600 dishwasher after a 20% c) The price of a 800 is now 680 800 holiday with 15% off