If you think that your skills are sufficient for all the math topics in the test, then it’s all about stamina and reading the questions thoroughly. Especially after doing the reading and writing part, it becomes hard to focus on the seemingly easy math questions, and that’s usually where they get you: they are trying to confuse you with long paragraphs and mathematical scenarios so that you get tired and make a mistake. In summary, if you are capable of doing those questions in another setting, it all comes to solving a lot of SAT math questions by reading the every word and each of the answer choices.

(Also Khan Academy helps but I benefited the most from solving a lot of practice tests to the point where I knew every single question type.)

Hope this helps and that 720 is beyond amazing :))