Question

How many zero pairs can be created in the model below?

2 x tiles and 1 negative x tile. 3 plus sign tiles and 2 negative tiles.
0
1
2
3

Answer 1

old question but will respond so this can be closed

for zero pairs, each item in the pair should add together to get 0

so x + (-x) = 0, so that's one pair so far.
+ and - cancel each other out. you can do this twice and end up with 1 positive tile leftover. so another two pairs.