一道巧算题(0.1²+0.2²+0.3²+0.4²)²÷(0.1&su
一道巧算题(0.1²+0.2²+0.3²+0.4²)²÷(0.1&su
化简再求值[(x²+y²)²-4x²y²]÷(x²-y&su
(2²+4²+6²+.+98²+100²)-(1²+3&su
求一道计算题,{(2\3x²)-(2\x²+y²)*[(x²+y²\3
20²-19²+18²-17²+16²-15²……+2&su
2008²-2007²+2006²-2005²+...+2²-1&su
1:49.9²+9.98+0.1² 2:99²+199
(100²+98²+96²……+2²)-(99²+97²+9
(99²+98²+97²+···90²)-(89²+88²+
帮我计算一道题~(根号2x²+x²)+(根号x²+1/2x²)=?根号2x&su
判断(2001)²ºº²+(2002)²ºº&su
化简代数式:[(a²+b²)/(a²-b²)÷2ab/(a-b)(a+b)&su