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2019新SAT数学练习题及答案解析5

2019-02-12 10:24:13来源:SAT考试网分享
导读:小面小编分享的SAT考试数学试题,每道题目后面都有答案和详细的解析,希望同学们在练习的时候先不看答案,看看自己能够做对几道题。针对自己的复习规划查漏补缺。

>>SAT考试模拟题:2019新SAT数学练习题及答案解析5

>>SAT考试经典课程推荐

Vera is planning to use exactly 112 feet(ft) of fencing as the border of a rectangular garden. If the width of the garden is 1/3 of the length of the garden, what is the width of the garden?

A.7ft

B.14ft

C.28ft

D.42ft

答案:B

解析:Choice B is correct. 宽是长的三分之一,长就是宽的3倍,则栅栏的宽=112/(2X4)=14ft

A study estimated that brown bears populate the Kenai Peninsula of Alaska at a density of 42 brown bears per 1000 km^2 of habitable area. According to this study, approximately how many brown bears populate an 8500 km^2 habitable area of this peninsula?

A.24

B.200

C.357

D.3035

答案:C

解析:Choice C is correct.

Hailey's laundry basket contains 7 shirts. These 7 shirts account for approximately 21% of Hailey's total number of shirts. How many shirts does Hailey have in total?

A.2 B.3 C.26 D.33

答案:D

解析:

题干翻译:衣服篓里有7件衬衫,他们大约占Hailey衬衫的21%。请问Hailey总共有多少衬衫?

Choice D is correct. Let T represent Hailey's total number of shirts. If 21% of Hailey's total number of shirts is 7, then the following equation can be written: 0.21·T=7

To solve for T, multiply both sides of the equation by 0.21. The value of T is 33.3. Because 21% represented an approximate portion of the total number of socks, the value found for T is not an exact amount. Therefore, the best answer for the Hailey's total number of shirts is 33.

The total number of shirts is 33.

以上这些试题都是很经典的,所以极具备参考价值。复习是一步一步来的,不是一天两天就能提高的。想学习更多SAT知识点就登录坦途网SAT考试频道吧,相信通过我们的帮助,同学们的SAT考试成绩会有很大提升,小编在这里等你哦!

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