Posted by Joanna on Thursday, September 8, 2011 at 2:15pm.
Explain how to find the sum positive eight plus negative ten using game chips, then give the answer.

algbra  bobpursley, Thursday, September 8, 2011 at 3:13pm
consider postive chips to be red, negative to be black. Each black stacked on a red is zero.
put out the positive, then take the black chips, stacking them on the red. So you have two left over. Sum is 2, as all the zeroes don't matter.
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