ACT考试的第二部分为数学测试(Mathematics Test),时长60分钟,涉及60道题目。数学的题目侧重考察数学知识点的应用,其中代数33道题,几何23道题,三角函数4道题,考查的知识点会包含复数、矩阵、概率、排列组合、相位、等比数列、等差数列、单位换算。和国内的普遍考试不同,ACT的数学考试部分可以使用计算器。
但因时间有限,考场气氛紧张,其中7--10道题目题干内容过长,对这些题目的阅读和理解通常成为考生最大的问题。

例题:
A data set has 20 elements. The 20 elements in a second data set are obtained by multiplying each element in the first data set by 20. The 20 elements in a third data set are obtained by decreasing each element of the second data set by 60. The median of the third data set is 20. What is the median of the first data set?
A. 2
B. 4
C. 6
D. 20
E. 80
答案
B is correct.
思考的逻辑
You can represent the three sets as: x, 20x, and 20x-60.
If the median of the third set (20x-60) is 20, then the median of the second set is 60 more than that, 80.
Since the second set it 20 times higher than the first set, 80/20 = 4.
以上就是小编为大家整理了关于ACT数学考点分析及试题讲解,希望对大家有所帮助。更多ACT考试评分标准、ACT考试时间安排等问题可以咨询我们。
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