官网发布：12月12日SSAT数学知识点汇总

　　根据官方指南的Practice Test题目，我们专业老师对12月12日的SSAT数学部分的知识点进行了归纳总结，快来查漏补缺、各个击破吧！

　　必备知识点：

　　Number Concepts and Operations数的概念和运算

　　1.Arithmetic word problems (including percent, ratio)算术文字题(包含百分数、比)

　　2.Basic concepts of addition, subtraction, multiplication, and division加减乘除的基本概念

　　3.Estimation估算

　　4.Rational numbers有理数

　　5.Sequences and series数列及其和

　　6.Frequencies频数

　　Algebra (elementary concepts of algebra)代数(代数的基本概念)

　　1.Properties of exponents指数的性质

　　2.Algebraic word problems代数文字题

　　3.Equations of lines直线的方程

　　4.Patterns模式、规律

　　5.Absolute value绝对值

　　Geometry/Measurement几何/测量

　　1.Area and circumference of a circle圆的面积和周长

　　2.Area and perimeter of a polygon多边形的面积和周长

　　3.Volume of a cube, cylinder, box正方体、圆柱体、长方体的体积

　　4.Pythagorean theory and properties of right, isosceles, equilateral triangles勾股理论，以及直角三角形、等腰三角形、等边三角形的性质

　　5.Properties of parallel and perpendicular lines平行线与垂直直线的性质

　　6.Coordinate geometry坐标几何

　　7.Slope斜率

　　Data analysis/probability数据分析/概率

　　1.Interpretation (tables, graphs)图表的解析

　　2.Trends and inferences趋势与推论

　　3.Probability概率

　　真题预测

　　1. How many cubed pieces of fudge that are 3 inches on an edge can be packed into a Christmas tin that is 9 inches deep by 12 inches wide by 8 inches high with the lid still being able to be closed?

　　A. 18 B. 24

　　C. 32 D. 36 E. 43

　　2. Sarah is twice as old as her youngest brother. If the difference between their ages is 15 years. How old is her youngest brother?

　　A. 10 B. 15

　　C. 20 D. 25 E. 30

　　3. Which of the following fractions is equal to 5/6?

　　A. 20/30 B. 15/24

　　C. 25/30 D. 40/54 E. 2/7

　　4. What will it cost to tile a kitchen floor that is 12 feet wide by 20 feet long if the tile cost $8.91 per square yard?

　　A. $224.51 B. $237.60

　　C. $246.55 D. $271.38 E. $282.32

　　5. In a writing competition, the first place winner receives 1/2 of the prize money. The second runner up receives 1/2 of what the winner won. What was the total amount of prize money distributed if the winner receives $6,000?

　　A. $6,000 B. $8,500

　　C. $12,000 D. $15,000 E. $18,500

　　6. You are lying 120 ft away from a tree that is 50 feet tall. You look up at the top of the tree. Approximately how far is your hear from the top of the tree in a straight line?

　　A. 50 feet B. 75 feet

　　C. 120 feet D. 130 feet E. 150 feet

　　7. A cyclist bikes x distance at 10 miles per hour and returns over the same path at 8 miles per hour. What is the cyclist’s average rate for the round trip in miles per hour?

　　A. 8.1 B. 8.3

　　C. 8.6 D. 8.9 E. 9.0

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