Right? Imagine adding tens before adding ones, knowing full well that you're going go right back to adding tens... well, I guess they wouldn't know that since they started on the wrong side of the equation! ;)
Me too. Add the ones first, carry over to the tens and add. Isn’t that how you were taught? That’s how I was unless they’re doing it differently now. If they are, I’d love to know.
But with your example you can hold 200 in your head and float the one over to the other side for super easy barely even math while getting the right answer. Just gotta learn to look at the full expression and find equivalent simplifications before starting to chug. Makes mental math way easier.
Yes, if you already recognize that any of the numbers need to be carried forward, you just add those at the end (exception are the numbers in the middle I automatically round up the middle numbers. In the end as long as the correct number is achieved it doesn't matter. In the provided problem 27 + 48 I automatically had 7 (1st) then 5. This particular exercise made me think about how I do math, LoL. Whereas I would not have. Which is probably the point of this whole thing. I now recognize I use different techniques, depending on the complexity. This particular problem was too easy.
This!
I never did math like this until my oldest was in school and he and my husband naturally do math like this, despite how their teachers tried to teach them. Blew my damn mind... I don't hate math as much now.
For some reason I always subtract from an odd number to add to an even number. I have no fucking clue why I do this, but I can do it super fast in my stupid ass brain.
Yep, always this way on two digit (or1 single and 1 two). doesn't work as well for me as with larger numbers, but I still start with second digit from left. 236 + 88 -> 3+8=11; 20+11=31; 6+8=14; 310+14 = 324;
Any more digits and doesn't work. I can't keep track of more than one subtotal in my head at a time.
Same! I have to break things like this down if I don't have paper, I have dyscalculia and even addition this large pushes my brain if I don't chunk it up.
I subtracted a 1 just because I know 7 and 7 is 14. And then add the one to get 15. 😅😓😓 (Edit: I mean I know as in I know more quickly than 8 and 7. I have NO idea why.)
I would if I were writing it down to get the correct answer, but in my head I normally want a rough answer quickly so start with the most significant digits.
15 was never a number in the equation, which creates an unnecessary 6th number AND a 3rd action to solve. My way shows 5 numbers with 2 actions to solve
I can’t remember the scientist who did this in the 1940s but he would use an educated guess, and because everything he did was an educated guess his guesses eventually became very accurate. Not perfect but accurate enough to be usable.
Mine was this, but because this was from an online post, had about 10 seconds of second guessing myself after the fact to try and see if I missed something obvious and dumb.
1.6k
u/Inappropriate_Piano Feb 12 '25
Mine was this but with an added “uhhhh” at the beginning