To add two integers, like 2 + (-7), model the addends using 2 positive unit tiles and 7 negative unit tiles. Combine positive and negative tiles to make as many zero pairs as possible. When no more zero pairs can be made there are 5 negative unit tiles remaining, so 2 + (-7) equals -5.
Adding Integers using the Brainingcamp Algebra Tiles virtual manipulative.
Brainingcamp virtual manipulatives can be used anywhere with no setup, cleanup, or lost parts. They are highly effective at engaging today’s digital learners and helping them bringing abstract math concepts to life.
Brainingcamp produces virtual manipulatives for iPads, Chromebooks, PCs, and Macs.