This was why I fell off with math in high school and never got my mojo back. My mental math skills were above average but once discipline and showing work and “proofs” (especially proofs) came into play I was out

I can barely count to a hundred without struggling, I keep forgetting what the next number is and repeat the number in my head to keep track of where I am until I remember what comes after 47.

Also just can't do mental math, I've memorised basic calculations rather than understanding them so if it's something I don't use a lot I start doubting myself and spend ages breaking it down without being able to keep track of it all.

I've heard of dyscalculia being common with ADHD people but my schools never tested for it.

I can't do mental maths, but learned a neat trick to do maths using near 10s or 5s in my head.

Got into calculus for a year during college, but when I got disappointed by something my math teacher did just gave up on calculus. Suddenly zero motivation. I don't like how my brain is wired...

I am totally the opposite. I can work through complex algebra proofs, but ask me to work out 2 x 3 + 21? Good luck.

I can't focus on math in my head. I always need to write it down otherwise i'll forget it in seconds.

My older daughter does this. You tell her a math problem. She'll blurt out the answer. Ask her how she got it, she doesn't know and can't explain it.

Shounds like my math experience.

I find showing my work and proving things super fun! It’s a puzzle for me, to show how things work. I’m doing a master’s degree in physics and I excel at the most rigorous classes and suck at the more heuristic ones.

I do everything in my head. I write only the outcomes of parts of my calculations, to not forget them or do errors.