My son's just turning 8 this year and has just started to learn some of the basics of multiplications, including multiplication signs.
However, he's started asking me why a negative multiplied by another negative would make a positive. It's quite hard to explain to a kid and I'm not quite sure how to put it. I've seen the other question regarding the same question but I fear the concepts within those answers are much too difficult for my son to wrap his head around.
What's the best way to explain to my kid why a negative × negative = positive? For reference, I'm looking for simple concepts to explain to a child to understand this. At this point he could care less about dot products, absolute values, multiplicative identities. He's just getting started with multiplication for crying out loud.