GRE/GMAT数学符号
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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 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 |
