精选6道SAT数学题.

　　下面是6道SAT数学练习题的内容，都是精选自SAT官方每日一题的数学部分。SAT数学练习题可以帮助大家更快更好的解答SAT数学题，可以帮助大家熟悉SAT数学词汇，掌握解题技巧，非常有用。大家一起来练习一下吧，不是很难。

　　1.Addtoand then subtractfrom the sum. Ifis a positive integer, the result must be an integer multiple of

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　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　2.If it is now 4:00 p.m. Saturday, in hours from now, what time and day will it be? (Assume no daylight saving time changes in the period.)

　　Answer Choices

　　(A) 5:00 a.m. Saturday

　　(B) 1:00 a.m. Sunday

　　(C) 5:00 p.m. Tuesday

　　(D) 1:00 a.m. Wednesday

　　(E) 5:00 a.m. Wednesday

　　3.What is the area of the triangle in the figure above?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　4.The graph above shows the distribution of the number of days spent on business trips in 2010 by a group of employees of Company W. Based on the graph, what is the median number of days spent on business trips in 2010 for these employees?

　　Answer Choices

　　(A) 22

　　(B) 22.5

　　(C) 22.75

　　(D) 23

　　(E) 23.5

　　5.If , , and are numbers such that and , then is equal to which of the following?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　6.A woman drove to work at an average speed of miles per hour and returned along the same route at miles per hour. If her total traveling time was hour, what was the total number of miles in the round trip?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　Explanation

　　1.The correct answer is B

　　The mathematical expression given in the question is, which is equivalent to. The expressioncan be factored as. For every positive integer,must be a multiple of. If, then, which is not an integer multiple of,,, or. Therore, the correct answer is.

　　2.The correct answer is E

　　Since each day has hours, it is a good idea to divide by to find the number of complete intervals in hours and the number of hours remaining after the intervals have been accounted for. When is divided by , the quotient is and the remainder is . The complete intervals tell you that days, or one full week plus days, go by, bringing you to Tuesday at 4:00 p.m. The additional hours take you into the next day, Wednesday. The hours will end at 5:00 a.m. on Wednesday.

　　3.The correct answer is B

　　Figures in a Coordinate Plane

　　The figure provides all the information you need to answer the question.

　　What Is the Question Asking?

　　You are asked to figure out the area of a triangle that is dined by the points in a coordinate plane.

　　What Do You Know?

　　The triangle in the figure is a right triangle with the right angle at the lower lt.

　　Because it is a right triangle, its base and height are the two sides that form the right angle.

　　The area of a triangle is.

　　The base of the triangle extends from pointto point. So it isunits long.

　　The height of the triangle extends from pointto point. So it isunits long.　　

　　4.The correct answer is A

　　Choice (A) is correct. There are 5 + 6 + 5 + 8 + 6 + 1 = 31 employees represented in the graph. If the employees are put in order according to the number of days spent on business trips from least to greatest (or from greatest to least), the median number of days spent on business trips is the number of days spent by the employee in the middle of the list. Since 312 = 15.5, this is the 16th employee (there will be 15 employees bore and 15 employees after the 16th employee in a list of 31 employees). From the graph, it can be seen that the 16th employee is in the group that spent 22 days on business trips (since 5 employees spent 20 days on business trips, 6 employees spent 21 days and 5 employees spent 22 days). Therore, the median number of days spent on business trips in 2010 for these employees is 22.

　　5.The correct answer is A

　　From is implied that (1)

　　And from is implied that (2)

　　If we multiply (1) and (2) together, we have that ( is canceled out).

　　6.The correct answer is C

　　Let represent the time it took the woman to drive to work. Since her total traveling time was hour, the time it took her to return home is . The distance in miles can be found using the formula . The distance traveled to work is , and the return distance is . Since the distance to work is the same as the return distance, . Solving for yields . So the distance one way is miles. The total number of miles in the round trip is , or miles.

　　以上就是精选的6道SAT数学练习题的全部内容。大家一定要记得，不要拿这些SAT数学练习题的难度和真正的SAT数学考试的难度相比，因为SAT数学考试的难度比这个要高，大家从中需要了解的是SAT数学考试的出题方式和相关词汇。

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