Is this mostly a ADHD thing? They tried to make me learn times tables at school but that never stuck. Recently had to solve a problem with a CRC and part of that was manually calculating a long division in binary. At some point realised I didn't even know how to do that in decimal so wound the clock back 35 years and learnt it from scratch. Badda bing badda boom, working CRC 🤓

I usually do that approach with multiplication of big numbers and square root calculation. Usually make it at most 10% error, which I consider quite a win :)

Is this not just how people do simple math? Why the hell else did they make us just memorize multiplication tables?

i actually do do this. also sometimes 7 + 6 = 7 + (3 + 3) = (7 + 3) + 3 = 10 + 3 = 13!

btw: i studied math.

Stop giving away our secrets...smh

I would actually step to 10 first by going (7+3)+(6-3)

Steal some from the 6 to make the 7 round up to 10, then ad the remainder to 10.

It's just a thing people do, has nothing to do with adhd

Can we stop making every little thing about ADHD? This is just a common way to do arithmetic

I don't think this has anything to do with ADHD, it's just a little shortcut you can use when doing math in your head. I was taught techniques like this in school when we learnt addition and subtraction etc.

This has nothing to do with ADHD.

Uhm aren't all people counting like that?

everything calculated in my head is just various examples of this daisy chained together

This is just what's called the "common core method". It's now the preferred method of teaching math in many Western countries.

Isn't this how they teach math now?

7+6

=8+5

=9+4

=10+3

=13

The way i calculate this, is knowing that 7 is 10-3, and 6 is 3+3.

So, 7 + 6 = 10 + 3 = 13

The way I do it:

6+6 = 12 +1 = 13

Dunno how relevant calculating is to ADHD, but it is fun to see how people calculate things in their heads in different ways.

I'm pretty sure they just had us brute-force memorize all of the single digit additions and multiplications in grade school. Seemed to work out okay for me.

ADHD? I thought I was just as dumb as some mid-sized pebble.

Six is two threes and seven plus three is ten so then we have the leftover three and add that to get thirteen.

Also, not everything is ADHD.

Same kind of trick, but for additions involving 7, I subtract 3 from the other number.

@Stamets

Is that NOT how the NT world does math???

🤯

generation gap happening here. common core wasn't a thing for a lot of us, it's brand new.

i do math the "common core" way not because it was taught to me but because the old methods didn't work and i had to figure it out on my own.

it may not be strictly "an adhd thing" but society made it so for a time.

6+6 = 12
+1 = 13