Question

use the chips to add.
4 + (-2)
(a) show how to do the problem. click here to learn more about these chips.

Explanation:

Step1: Represent 4 with + chips

Take 4 yellow (+) chips: $++++$

Step2: Represent -2 with - chips

Take 2 red (-) chips: $--$

Step3: Pair + and - chips

Each + and - chip cancels out. Pair 2 of the + chips with the 2 - chips: $++++ + -- = (++--) + ++$

Step4: Count remaining chips

The paired chips cancel, leaving 2 + chips.

Answer:

$2$