本文为大家整理的是几道ACT数学练习题，大家可以参考一下，以便帮助大家更加充分地备考，早日取得数学高分。
ACT数学练习题,ACT数学
下面就让小编来为大家介绍一下ACT数学练习题的相关内容吧，大家要好好把握，希望能够给准备ACT考试的同学带来帮助。
1. 3x3·2x2y·4x2y is equivalent to:
A. 9x7y2
B. 9x12y2
C. 24x7y2
D. 24x12y
E. 24x12y2
解析：The correct answer is C. To find an equivalent expression, you can multiply the constants (3·2·4), combine the x term (x3x2x2 → x3+2+2 → x7, because when you have a common base you use the base and add the exponents), and combine the y terms (y·y → y1y1 → y1+1 → y2). The result is 24x7y2.
正确答案选C。常数相乘(3·2·4)，合并x项(x3x2x2 → x3+2+2 → x7) 和y项(y·y → y1y1 → y1+1→ y2)，结果为24x7y2。
2. Mr. Dietz is a teacher whose salary is $22,570 for this school year, which has 185 days. In Mr. Dietz's school district, substitute teachers are paid $80 per day. If Mr. Dietz's takes a day off without pay and a substitute teacher is paid to teach Mr. Dietz's classes, how much less does the school district pay in salary by paying a substitute teacher instead of paying Mr. Dietz's for that day?
F. $ 42
G. $ 80
H. $ 97
J. $105
K. $122
解析：The correct answer is F. To find Mr. Dietz's pay per day, you can divide his salary, $22,570, by the number of days he works,185. His pay per day is 22570/185, or $122. When Mr. Dietz takes a day off without pay and the school pays a subsititute $80, the school district saves the difference in these amounts, 122-80, or $42.
正确答案选F。先算出Dietz先生每天的平均工资，用22570除以185(可用计算器)，即122美元。再用122美元减去学校需要支付临时老师的费用80美元，即可算出学校结余的费用，为42美元。
3. So far, a student has earned the following scores on four 100-point tests this grading period:65,73,81, and 82. What score must the student earn on the fifth and last 100-point test of the grading period to earn an average test grade of 80 for the 5 tests?
A. 75
B. 76
C. 78
D. 99
E. The student cannot earn an average of 80.
解析：The correct answer is D. To find what the student needs to score on the fifth 100-point test to average a score of 80, you need to find the point total for the student so far by adding 65,73, 81 and 82. That sum is 301. Averaging 80 points on 5 tests means the student must earn 400 points (80·5). The acore needed on the last test is the difference,400～301, or 99.
正确答案选D。该学生前四次共得301分;5次考试平均分为80，意味着5次考试总分需达到400分，那么该学生最后一次考试需要达到的分数为400与301的差，即99分。
4、The perimeter of a parallelogram is 72 inches, and 1 side measures 12 inches. What are the lengths, in inches, of the other 3 sides? (一个平行四边形，一边长72英寸，其他三边长是多少)
A 12 12 36
B 12 18 18
C 12 24 24
D 12 30 30
E Cannot be determined from the given information
5、If 7+3x=22,then 2x=?
F 5
G 10
H 12
J 14
K 58/3
6、Which of the following figures in a plane separates it into half-planes? (平面上一个什么图形可以把它分成半个平面)
F. A line
G. A ray (一条射线)
H. An angel (一个角)
J. A point
K. A line segement (一条线段)
以上就是ACT数学练习题的内容，希望大家能够用心体会，更多精彩内容小编稍后为您呈现。最后，前程百利祝大家在留学考试中取得优异的成绩。
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