Friday, February 11, 2011

This Month's Teachable Moment

Mental Mall Math:  When the kids want the cash, make sure they can do the math!

ExampleWhat is the sale price of a $250.00 North Face jacket that is discounted by 30%?

A quick way to find the answer is to first calculate 10% of $250.00. In math, "of" means "multiply." To multiply $250.00 by 10%, just move the decimal one place to the left to get $25. Note that you can calculate 10% of ANY number by following the same procedure.

Next, multiply $25 x 3 (look at this as 10% x 3=30%) to get $75. Finally, subtract $75 from $250 to get $175, which is the sale price of the North Face jacket.

Now, go TEACH it!

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