SAT數(shù)學(xué)練習(xí)題目兩道.

　　下面是兩道SAT數(shù)學(xué)練習(xí)題目，都是關(guān)于代數(shù)方面的。SAT數(shù)學(xué)考試的出題方式和答題的思路都是和國內(nèi)的數(shù)學(xué)題目有很大的區(qū)別的，所以大家在備考SAT數(shù)學(xué)考試的過程中，一定要多加練習(xí)才能熟練的掌握。下面我們就一起來看看這兩道SAT數(shù)學(xué)練習(xí)題目的詳細(xì)內(nèi)容吧。

　　Mathematics > Standard Multiple Choice

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

　　Which of the following statements must be true of the lengths of the segments on line above?

　　Answer Choices

　　(A) only

　　(B) only

　　(C) only

　　(D) and only

　　(E) , , and

　　The correct answer is B

　　Explanation

　　Consider each statement separately. For example, consider statement , . From the figure, you can see that segment is made up of the segments , , and . This tells you that cannot equal , since cannot equal zero. Statement is not true.

　　Consider statement , . Since is between and , it follows that . Since is between and , it follows that . Therore, . Since both and equal , they are equal to each other. Statement is true.

　　Consider statement , . The lt side of the equation, , is equivalent to . The right side of the equation, , is equivalent to . Since cannot equal zero, is not equal to . Statement is not true.

　　Statement is the only one that is true.

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

　　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

　　The correct answer is A

　　Explanation

　　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

　　以上就是這兩道SAT數(shù)學(xué)練習(xí)題目的全部內(nèi)容，都是包括了圖形的識(shí)別的。大家可以在自己備考SAT數(shù)學(xué)考試的過程中仔細(xì)體會(huì)這些SAT數(shù)學(xué)題目的出題方式，以便更好更加有效率的解答SAT數(shù)學(xué)考試的題目。

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