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《GRE数学符号和常用的数学表达方式
GRE/GMAT数学符号和常用的数学表达方式
数学试题中常用的数学符号总结如下: SYMBOL MEANING
=is equal to≠ is not equal to ≈ is approximately equal to > is greater than ≥ is greater than or equal to < is less than ≤ is less than or equal to square root 0.8 the repeating decimal 0.888… r s’t” r degrees s minutes t seconds ∠angle rightangle ┻ is perpendicular │x│ absolute value of x ∥ is parallel to △ triangle ~ is similar to ≌ is congruent to △x delta x AB arc AB π pi(3.1415…) 1.is equal to; is the same as =the result is; yields; gives
2.the sum of x and y; the total of x and y; x added to y; x increased by y; x+y x more then y; x greater than y
3.x minus y; x less y; the difference of x and y; x take away y;from x subtract y’ x decreased by y; x-yx diminished by y; y is subtracted from x;y less than x (note the reversal)
4.x multiplied by y;xythe product of x and y;
5. divided by y; the quotient of x and y; x y,y divided into x (note the reversal)
6.A and B are factors of C;A and B are divisors of C;C is divisible by A and by B; A B=CC is a multiple of A and of B;A divides C and B divides C;
7. the ratio of a to b a:b,
8. reciprocal of x
9. x times as many z as y; z=x y
10.a squared; a to the second power a2
11. a cubed; a3a to the third power
12. between a and b (a,b)between a and b, inclusive [a,b]
13. off 低于,从……中扣除
14. account for 占
15. third
16. of x (a fraction of x); x,0.75x 75% of x (a percent of x)
数学符号一般有以下几种: (1)数量符号:如 :i,2+ i,a,x,自然对数底e,圆周率 ∏。 (2)运算符号:如加号(+),减号(-),乘号(
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