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Middle Grades Math: Calculating Sale Prices
by Texas Instruments

Overview

In this activity, students will find discounts and sale prices for items selling at 20% off and 40% off by using tables. They will then find the general rules, using a variable, for finding those discounts and prices.

Key Steps

• Students will find discounts and sale prices for items selling at 20% off and 40% off by using tables. They will then find the general rules, using a variable, for finding those discounts and prices. First, students will create a table showing the discount and sale price for the 20% off sale the sporting goods store is having. The calculations will initially be done on the Home screen.

• Then, students will enter equations for the discount and the sale price in the Y= editor to set up a table.

• Finally, students will explore the 20% off table before exploring a 40% off sale.