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
square root
0.8 the repeating decimal 0.888…
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
ab arc ab
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; xy the product of x and y;
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
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)