2016.11.08 12:15
新东方在线SAT频道为大家带来SAT数学备考策略:SAT数学高分秘诀一文,希望对大家SAT备考有所帮助。更多精彩尽请关注新东方在线SAT频道!
SAT数学备考策略
Trick #12: Know the Formulas
熟记公式
Although the SAT does provide important formulas at the beginning of each of the Math sections, you’ll be a much more efficient test-taker if you have the formulas memorized. It's a waste of time to keep flipping back to the beginning of the section whenever you think you need a formula to solve a problem.
在考卷中,虽然也会给出一些常用的公式,但是记住这些公式,或者自己常用的公式能够为考试节省不少时间。

Trick #13: Plug in Answers
代入法:化繁为简
If you have no idea how to solve a math problem, one way to get around that is just to plug in the answer choices until you find the correct solution.
在数学考试中,代入法是最有效的解题方法,尤其是你找不到解题思路时。代入法,通常分两步走:首先用一个数置换问题中的未知数(不要用0、1或者问题中已经出现过的数)得到一个答案;然后用这个答案去检查四个选项。比如:
Xerxes is x years old and 4 years older than Zera. How old was Zara 7 years ago?
(A) X-3
(B) X-4
(C) X-7
(D) X-11
根据题意,在题干中代入一个比11大的数,比如12,原题即可变为一道简单的算术题:Xerxes is 12 years old and 4 years older than Zera. How old was Zara 7 years ago? 12-4-7=1
再将12代入四个选项中
(A) 12-3
(B) 12-4
(C) 12-7
(D) 12-11
很明显只有D答案正确。
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