advice please

so i love math, its my fav subject n i get above 95%+ in all math exams but never 100% mainly cuz of dum mistakes like misreading qs, calc errors, N MAJORITY NOT MENTIONING STEPS, so i prepared rly well, but ended up making a mistake worth either 1 or 2 ms cuz i didnt understand the question, but after i got home i understoof it i feel so dum. IM SO MAD CUZ MATH IS LIKE MY FAV SUBJECT N I RLYY WANTED A 100% esp cuz i was improving n stuff ...