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

　　根号 square root

　　0.888888… the repeating decimal

　　r s't"  r degrees s minutes t seconds

　　∠?angle

　　∟ right angle

　　┻ is perpendicular¹

　　│x│ absolute value of x

　　∥ is parallel to

　　△ triangle

　　～ is similar to

　　≌ is congruent to

　　△x delta² x

　　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;

　　?the product of x and y;                                 xy

　　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                                         1/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                            [a,b]

　　13. off ?                                低于，从……中扣除

　　14. account for                                         占

　　15. one third                                               1/3

　　16. a of x (a fraction of x);?                             ax

　　75% of x (a percent of x)                              0.75x

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