“Do you think MIT give more weightage to Math score than Reading/writing”
Yes. At least when I was there (a long time ago) the other students almost universally had SAT math scores that were significantly higher than their reading / English scores. It was very common to see students with 790 or 800 on the math part of the regular SAT, as well as on the math SAT subject test. I do not remember ever meeting anyone who had 800 on the English part of the SAT, and there were multiple students (including me) who had less than 700 on the English/reading part of the SAT.
I think that you daughter’s SAT score is very good.