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» 揭秘2016年新SAT:数学 你必须知道的事!
揭秘2016年新SAT:数学 你必须知道的事!
2015-08-01 00:00:00
Author:
才腾教育Chyten
备考专家Neil Chyten
独家解密新SAT数学考试
很多新SAT数学问题的设计目的是来测试学生的阅读水平和对可能隐藏在解释、情境和例子中的数学概念的理解程度。错误的解读一道题将不可避免的导致一个错误的答案——大学理事会恰恰将这些预料中的错误答案安排在了那些答案选项中。
所有精心编写的试题都会被设计成另一定比例的学生选择错误的答案——而新SAT则是一个编写非常出色的测试!这就意味SAT试题中将包含着陷阱。要避免陷阱答案,必须仔细读数学问题,深度分析问题中的关键词,忽略那些故意让人分心或毫不相关的信息。细读数学问题和仔细理解阅读或写作问题同样重要。以下是新SAT考试中不同类型数学问题的两个例子,及如何快速并简单解决问题的方法。
练习题目1:
练习题目2:
才腾解答:解答这类问题的一个好方法是用一个具体数字代入X中,计算出中间值和平均值,然后求差值。最佳的解题方法则是懂得“一组等距数据中,中间值和平均值完全相等”。例如,在1,2,3,4,5这组数字中,中间值和平均值都是3。因此,无论X为何值,答案都是0。
才腾解答:解答这类题的一个好方法是要记得,兩點之間的距離也是一個直角三角形的斜邊,再相应从这一点突破。而最佳的解题方法则是尋找畢達哥拉斯三角形( 3,4,5) , ( 5,12,13 )等。问题中的數字13是一条关键線索。正如我們在才腾常說的 ,SAT中無巧合。从這一點上看,你可以仅通过观察答案选项来确定是5还是12(并做一个简要的事实验证), 没错,正確答案是(C ) 5 。
当然,还有其他解题方法,上述的解题方法将是最快捷的并且让学生有最大的机会达到,并正确的解答测试中最可能多的题目。在Neil Chyten亲自编写的新书《Mastering the New SAT》中详细给出了大约500个数学问题的解题策略。
希望了解关于新SAT或ACT的信息,请拨打才腾总部电话800-428-8378。
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