More addition of integers: counters

I show how counters can be used to model addition of integers. Then we talk about adding two integers with opposite signs - how does that work? The rule, or shortcut, is to subtract their absolute values, and then check "which side wins", so to speak, to determine the sign of the final sum.

See also

Subtraction of integers — a video lesson

Back to the grade 7 video index

Back to the integer videos index

Back to all videos index

Math Mammoth Grade 7 complete curriculum

Math Mammoth Integers — a self-teaching worktext with explanations & exercises for all operations with integers