下面是为大家准备的2013年9月16日—9月19日的4道SAT考试数学选择题练习题。同学们在备考SAT数学的过程中，一定要加强习题的练习，熟练到能充分理解题意，争取得到满分。

　　1.If, which of the following must be equivalent to?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　2.A gasoline tank on a certain tractor holdsgallons of gasoline. If the tractor requiresgallons to plowacres, how many acres can the tractor plow with a tankful of gasoline?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　3.

　　The graph ofis shown above. If, and ifis on the graph of, which of the following must be true?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　4.

　　The circle above has center . Given segments of the following lengths, which is the length of the longest one that can be placed entirely inside this circle?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　参考答案及解析：

　　1.The correct answer is E

　　Explanation

　　If, then, so.

　　2.The correct answer is A

　　Explanation

　　In the question, you are told thatgallons of gasoline can plowacres and you are asked to find how many acres, call it, can be plowed bygallons. You can set up a ratio of the number of gallons of gasoline used to the number of acres plowed. Therefore, you have. Cross-multiplying and solving forgives you the answer ofacres, oracres.

　　3.The correct answer is D

　　Explanation

　　The second coordinate of a point on the graph corresponds to. From the graph, you can see that for, the smallest value ofisand the greatest value is, so.

　　4.The correct answer is C

　　Explanation

　　Since the radius of the circle is , the diameter of the circle is . In a circle, the diameter is longer than any segment that can be placed entirely inside the circle. Therefore, segments of length or length could not be placed entirely within the circle, and the correct answer is .

　　以上就是关于4道SAT考试数学选择题练习题及其答案和解析，非常详细。同学们在备考阶段，一定要加强习题的练习以及题意的理解，争取SAT数学满分。