SAT数学练习题目两个.

　　下面为大家搜集整理的是两个SAT数学练习题目，都是关于数学运算方面的选择题。SAT数学题对一般的中国考生来说，掌握的难度集中在理解题目的出题方式和加快解题速度两个方面。下面我们就来看看这两个SAT数学练习题的解答有什么特点吧。

　　SAT官方每日一题之数学---选择：

　　Mathematics > Standard Multiple Choice

　　Read the following SAT test question and then click on a button to select your answer.

　　A gasoline tank on a certain tractor holds gallons of gasoline. If the tractor requires gallons to plow acres, how many acres can the tractor plow with a tankful of gasoline?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is A

　　Explanation

　　In the question, you are told that gallons of gasoline can plow acres and you are asked to find how many acres, call it , can be plowed by gallons. You can set up a ratio of the number of gallons of gasoline used to the number of acres plowed. Therore, you have . Cross-multiplying and solving for gives you the answer of acres, or acres.

　　Read the following SAT test question and then click on a button to select your answer.

　　On the line above, if , which of the following must be true?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is B

　　Explanation

　　You can rewrite as , as , as , and as , and then consider the five answer choices.

　　The first answer choice is equivalent to is less than . You know that is less than and that is also less than , but the sum of and might not be less than . Since the question asks which statement must be true, the first answer choice is not the correct answer.

　　The second answer choice is equivalent to is less than . This statement must be true, because is less than and is less than . Although there is no need to consider the other answer choices once you see that the second answer choice must be true, each of the remaining choices could be rewritten in the same way and you could see that they need not be true

　　以上就是这两个SAT数学练习题目的全部内容，都来自SAT官方网站，后面附有详细的答案解析。大家在备考SAT数学考试的时候，可以适当的参考一下上面数学题目的解法，重点放在思路的转换上。

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