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nooo my genderinos (mander.xyz)
submitted 11 months ago by to c/science_memes@mander.xyz
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[–] 5 points 11 months ago

First you make them memorize single digit subtraction X - Y where X >= Y. Then you extend that to small double digit numbers.
Then you teach "borrowing". 351-213. Subtract the 1s column. Can't take 3 from 1, so borrow 10 from the 5 in the 10s column, making 11 in the 1s column and 4 in the 10s.

Definitely more clear, right?

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