GMAT Math help

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96% math
60% english = 640
i got a 5.5 on essay though...

Took gmat maybe 6 years ago if not more, hardly studied but i definitely regret not studying for all that dumb english grammar, which easily cost me a 700+ score

To study properly i suggest just doing a few practice tests, that ought to suffice

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Thanks for the responses everyone but my specific question is how you dealt with the "math without a calculator" in a timely fashion. Meaning you probably know how to solve the problem but you still gotta do like 124858 X 858585 and then .378348/904933 type of stuff to get the answer.