例如:mechanical toy cars A, B, and C, each traveling at its own uniform rate, started from the same point at the same time and raced a 400-meter course. When A crossed the finish line, B was 40 meters behind A, and C was 58 meters behind A. When B crossed the finish line, how many meters was C from the finish line?
整个题目最重要的是能立刻得出关系式:400/A=360/B=342/C
忘掉不重要的单位,除非单位不同要换算。那么ABC三者的速度关系显而易见,最后的答案也应该一清二楚。
综上所述,解决GRE数学难点的最根本方法是熟能生巧,多做题。做题的意义不在于数学知识的复习,而重点在于熟悉这些GRE数学的说法。当然有的时候题目里面也能遇到一些生词,顺便背诵之。
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