Teacher2Teacher 
Q&A #9415 
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From: Nora To: Teacher2Teacher Public Discussion Date: 2002121502:08:26 Subject: integers Your original question about 4  4 can also be explained by thinking about the two different meanings of subtraction, take away and difference. Take away: if you have 4 and take away 4 you are left with zero Difference: What is the difference of 4 and 4? Zero I regret that when I was learning about integers I never thought of problems like this but simply applied the rule. In the problem 12 3 you can take away 3 from 12 and are left with 9. No rule needs to be appliedsimply common sense. Yes, math does make sense!!
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