= 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 perpendicular

│x│ absolute value of x

∥ is parallel to

△ triangle

～ is similar to

≌ is congruent to

△x delta 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