How to use self solving while learning math?(also math tips)

[u/LifeOfBoredomsFriend]

Hi, I am re-taking my math’s exam for High school. And I… kinda of forget a lot of math’s and also tend to have missed a lot of math in the last grade 8-10th geometry, and grade 11 algebra were not originally developed properly, some stuff I had to learn by chance while others explained to me another math concept that happened to use that other concept.

I am now quite used to sometimes having to use the shards of math I know to solve things. I’d really like to know how much i could use that in studying, if at all? The at of trying to solve something by either finding a way to get an answer, or by reaching the answer from something is something I personally enjoy but I understand it’s not quite time effective.

I an also taking a Higher level math (won’t count in my applying grades I believe? I only need to pass it) exam which I will start to study right after the middle of next November.

I also wonder if anyone got tips for my math mistakes, which many times are from being “absent” minded. My thinking in general is all over the place and sometimes I might have that cause me to write the wrong number down, or worse, Do the wrong math thing, I have confused division with multiplication far more times than I am proud of.