I think estimation comes naturally over time.
I suck at math but I’ve found my own means of estimating to close and measuring to accurate.
I had a job where I had to cut a hole in the center of truck lids for a key/latch assembly. Rather than measuring the whole distance and calculating the center, I measured to a round number near center and then measured the same distance from the other side and gave myself a nice short 2 to 4 inches distance to measure the center accurately. The boss shook his head at it but couldn’t complain because I was finding center.
Nice solution! Actually, it might be more accurate sometimes, as you pointed out, it’s easier to measure something short.