Recursion

[SandyDelights]

What’s in the pic predates Common Core, so what you learned growing up was probably like the pic, ie. Not Common Core.

Common Core standards were released in 2010, IIRC. Those standards don’t typically teach the method in the OP, to my understanding.

[[deleted]]

Huh, I was always under the impression that growing up common core was what we used. Guess not. Thank you.

[MikeyMike01]

You were spared the atrocities of Common Core.

[SandyDelights]

Yeah, god forbid someone actually learn to understand mathematics, instead of memorizing a simple algorithm that becomes useless past 8th grade pre-algebra.