在GRE考试中，无论是词汇、阅读、写作还是数学，我们都需要花费大量的时间和精力去学习，在备考的过程中找到符合自身的学习方法，同时还需要结合相应的备考资料来进行学习。下面小编为大家整理了关于GRE考试备考的相关资料，供大家进行参考!

ARITHMETIC

The review of arithmetic begins with integers, fractions, and decimals and progresses to the set of real numbers. The basic arithmetic operations of addition, subtraction, multiplication, and division are discussed, along with exponents and roots. The section ends with the concepts of ratio and percent.

1.1 Integers

The integers are the numbers 1, 2, 3, and so on, together with their negatives, -1, - 2, -3, . . . , and 0. Thus, the set of integers is { . . . , - 3, - 2, -1, 0, 1, 2, 3, . . . }.

The positive integers are greater than 0, the negative integers are less than 0, and 0 is neither positive nor negative. When integers are added, subtracted, or multiplied, the result is always an integer; division of integers is addressed below. The many elementary number facts for these operations, such as 7 + 8 = 15,

78 - 87 = -9, 7 - (-18) = 25, and ( 7 )(8 ) = 56, should be familiar to you; they are not reviewed here. Here are some general facts regarding multiplication of integers.

•The product of two positive integers is a positive integer.

•The product of two negative integers is a positive integer.

•The product of a positive integer and a negative integer is a negative integer.

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