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      1. GMAT數學需要哪些基本功

        發布時間:2017-07-17 編輯:1025

          GMAT數學復習,對于許多準備參加GMAT考試的考生來說,是一個艱苦的過程。雖然GMAT數學考查的內容相當于內地初中,但是將GMAT數學放在英語語境下,讓很多考生很不習慣,再加上GMAT數學強調的實際應用能力,更為考生增加了難度。作為GMAT數學基本功的算術,卻是內地考生所熟悉的,就讓專家幫你支幾招,從算術上尋找突破口。

          一.整數:integer,whole number

          1.因子:factor or divisor

          If x and y are integers and x≠0,x is a divisor (factor) of y provided that y=xn for some integer n. In this case y is also said to be divisible by x or to be a multiple of x. For example, 7 is a divisor or factor of 28 since 28=7 4, but 8 is not a divisor of 28 since there is no integer n such that 28=8n.Divisible adj.可以被整除的  multiple n.倍數

          2.商和余數:quotients and remainders

          余數和商都可以為0

          3.奇數和偶數:odd and even integers

          奇數和偶數都可以是負數;零一定是偶數

          4.質數和合數:prime numbers and composite numbers

          A prime number is a positive integer that has exactly two different positive divisors,1 and itself. For example, 2,3,5,7,11, and 13 are prime numbers, but 15 is not, since 15 has four different positive divisors, 1, 3, 5, and 15. The number 1 is not a prime number, since it has only one positive divisor. Every integer greater than 1 is either prime or can be uniquely expressed as a product of prime factors. For example, 14= (2) (7), 81= (3) (3) (3) (3), and 484= (2) (2) (11) (11).

          注:除了1和其本身外,還有其他因子的數叫合數。最小的質數為2,最小的合數為4,在討論質數和合數時,都指正數。1和0既不是質數,也不是合數。

          5.整數中的重要概念:

          * Perfect square完全平方數,諸如9 = 32

          * Perfect cube 完全立方數,諸如8 = 23

          * the greatest common divisor 最大公約數

          幾個數所公有的最大因子稱最大公約數,諸如:48與36的公因子有1,2,3,4,6,12,其中12為最大公約數。

          * the least common multiple最小公倍數

          幾個數所公有的最小倍數稱最小公倍數,諸如:3,7和14的最小公倍數為42。

          *連續正整數的算術平均值也是首項和末項的算術平均值。

          同理,連續奇數與連續偶數的算術平均值也是首項和末項的算術平均值。

          GMAT數學復習,最關鍵是將基礎打牢。GMAT數學的基礎就是算術能力,如果連算術能力都掌握不好,就更不用提GMAT數學能力的提高了。GMAT數學算術,其實跟國內無異,GMAT數學算術因此可以算是一個良好的突破口,考生在GMAT數學復習時,要牢牢把握這一點。

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