Teacher2Teacher |
Q&A #6501 |
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
Post a public
discussion message
Ask Teacher2Teacher a new question
[Privacy Policy] [Terms of Use]
Math Forum Home ||
The Math Library ||
Quick Reference ||
Math Forum Search