Teacher2Teacher Q&A #6501

Context stories to explain negative numbers

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From: Jeanne (for Teacher2Teacher Service)
Date: Jun 13, 2001 at 15:38:22
Subject: Re: Context stories to explain negative numbers

Hi, I do not have a great deal of experience in using this context; however, I thought I'd share a context a friend of mine uses with her middle school students. She talks about an absent-minded mail delivery person. He delivers checks (+) and bills (-). (This addresses addition/multiplication of integers.) After they get a sense of addition and multiplication. She goes on to talk about a particularly crazy week, the mail delivery man had to return to take away checks and take away bills. (This addresses subtraction of integers.) Example: He delivers a check for \$25 and 2 bills, \$15 each. The net "value" is negative \$5. 25 + 2(-15) = -5 Example: He delivers a check for \$30, but has to take a way a bill for \$20. The net "value" is \$50. 30 - (-20) = 50 Cheers. -Jeanne, for the T2T service

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