新GRE数学考试符号简介

　　+ plus ;positive

　　- minus ;negative

　　 multiplied by ;times

　　 divided by

　　= equals

　　 approximately equals

　　 not equal to

　　 less than

　　 greater than

　　 equal to or less than

　　 equal to or greater than o

　　 round brackets ;parentheses

　　 square brackets

　　{ } braces

　　 is a member of the set

　　? is a subset of

　　∽ similar to

　　≌ congruent to

　　 denotes an operation

　　 therefore

　　∵ because

　　∶ ratio sign, divided by, is to

　　∷ equals, as

　　∥ parallel to

　　 perpendicular to, at right angles with

　　 angle

　　∟ right angle

　　o degree

　　 minute

　　 second

　　⊙ circle

　　A?B arc AB

　　e the base of natural logarithms,approx.2.71828

　　x! factorial x, x---1

　　lognx log x to the base n

　　 pi

　　lnx log x to the base e

　　lgx log x to the base 10

　　|x| the absolute value of x

　　以上就是新GRE数学常用符号英文注释的整理，这些常用符号在新GRE数学中经常出现，希望考生们能够认真背诵下来。