第一步，先花2个小时精读一遍OG12的math review
回顾基本知识，熟悉数学名词。math review囊括了考试中可能遇到的绝大多数数学名词，省得再单独记单词。DS题序言那一章可以看一眼DS的充分条件举例。DS题中，特殊疑问句必须唯一解才算充分。一般疑问句，能yes或no都算充分。
第二步，连续多遍地做同一套prep数学。比如连续模考prep 1的数学部分，做多遍一直到51分，找到51分的感觉
习惯读英文数学题的感觉，巩固数学名词。熟悉各种题型解题步骤，比如DS题，养成固定的解题习惯。认真总结自己错题的类型。
第三步，选个合适的考试时间，换题后一周狗狗就很充分了。
第四步，考前一周仔细做一遍狗狗。
第五步，现场考试时前十题慢点答。
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