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)