Teaching kids to do math without calculators is like teaching people to do carpentry without a measuring tape. It’s slower and less accurate for no real benefit. Before we had calculators, everyone used an abacus or a slide rule. Calculation aids have always been an integral part of math, and knowing how to properly apply them makes you better at math (faster, more accurate, deeper understanding). We literally developed computers in the first place so we could do less mental math because it is so unreliable.
Why does the logic of technology/industry fall apart for calculators? I’ve never understood it. There’s no other field where we perceive “lack of tool use” to be an advantage.
EDIT: It would be like practicing fingerpainting in art class because "you won't always have a brush in your pocket" Hell, why even learn to read when you won't always have a book in your pocket? Better not play basketball in gym class, you won't always have a ball in your pocket! It's just always been a totally goofy attitude. I didn't accept this illogical take as a child and I sure don't accept it now 😂