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-y
x diminished by y； y is subtracted from x；
y less than x （note the reversal）
4.x multiplied by y；
xy
the 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=c
c 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； a3
a to the third power
12. between a and b （a，b）
between a and b， inclusive
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）