Comments on: Integer Operations Posters https://mathequalslove.net/integer-operations-posters/ Lessons Taught and Lessons Learned as a High School Math Teacher Wed, 08 Jan 2025 02:25:39 +0000 hourly 1 https://wordpress.org/?v=6.4.5 By: Anonymous https://mathequalslove.net/integer-operations-posters/comment-page-1/#comment-6675 Wed, 24 Jul 2013 09:19:09 +0000 #comment-6675 I use even and odds in my definition of multiplying integers. 0 or 2 negatives make a positive, one negative makes a negative. Give them a series of problems with (2)(-2) and (-2)(-2) and (-2)(-2)(-2), and have them figure out the pattern.

I also explain it in lecture with a red/yellow counter chip "coin" that we have for integer ops. Negative means "opposite of" and is represented on the coin by a flip from yellow to red, and so the opposite of the opposite is a flip of a flip, back to yellow. Flipping the coin from positive yellow to negative red to positive yellow, etc, gets them picking up on those patterns that will be so useful once they hit imaginary numbers!!!

]]> By: 'becca Flora https://mathequalslove.net/integer-operations-posters/comment-page-1/#comment-6674 Thu, 13 Jun 2013 07:21:11 +0000 #comment-6674 but if there are three negatives multiplied together ….they have the same sign but the answer is not positive. My sixth graders arrived saying that if the signs were the same the answer needed to be positive. We did some hands on with a 'sea of zero' and discovered it wasn't true. Maybe an asterisk is needed on the multiply/divide posters

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