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

　　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. third

　　16. of x (a fraction of x);　　 x，0.75x

　　75% of x (a percent of x)