this post was submitted on 18 Jun 2025
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Is this not just how people do simple math? Why the hell else did they make us just memorize multiplication tables?
three of the six falls into the gap between the 7 and 10, leaving 3 sticking out the top = 13.
I have no idea if this is normal or not
That's exactly how I do it!
I think I do something similar. Basically.10-7=3, 3+3=6 so 7+3+3=13 or simplified 7+6=13. Or like the above with 7+7=14 therefore 7+6=13
In elementary school my son would not memorize addition and multiplication and just use strategies like this.
That became a problem later on as we just can handle a finite number of intermediary results in our brain, so just memorizing the tables reduces a lot of mental load for calculation in your brain.
Another thing that helped him a lot was just writing down intermediaries on a piece of paper.
Btw it was a bit similar for me, I just got the table memorized perfectly and got faster doing simple calculations in my mind than using a calculator when I was training the multiplication and addition tables with my son.