SAT數(shù)學(xué)練習(xí)題目?jī)蓚€(gè).

　　下面為大家搜集整理的是兩個(gè)SAT數(shù)學(xué)練習(xí)題目，都是關(guān)于數(shù)學(xué)運(yùn)算方面的選擇題。SAT數(shù)學(xué)題對(duì)一般的中國(guó)考生來(lái)說(shuō)，掌握的難度集中在理解題目的出題方式和加快解題速度兩個(gè)方面。下面我們就來(lái)看看這兩個(gè)SAT數(shù)學(xué)練習(xí)題的解答有什么特點(diǎn)吧。

　　SAT官方每日一題之?dāng)?shù)學(xué)---選擇：

　　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

　　以上就是這兩個(gè)SAT數(shù)學(xué)練習(xí)題目的全部?jī)?nèi)容，都來(lái)自SAT官方網(wǎng)站，后面附有詳細(xì)的答案解析。大家在備考SAT數(shù)學(xué)考試的時(shí)候，可以適當(dāng)?shù)膮⒖家幌律厦鏀?shù)學(xué)題目的解法，重點(diǎn)放在思路的轉(zhuǎn)換上。

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