[eli5] Trying to teach to an autistic child why 4 – (-2) is 4 +2.

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Title. I know it goes like that, but as an non mathematician can’t explain it to him.

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Anonymous 0 Comments

Make it like a variant of Uno. You’ve got 4 points. Your opponent plays a card marked “lose 2” on you. Oh no!

Luckily you have a “reverse” or “opposite” card that you play back. How many points do you end up with?

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