小明算3*(a+0.6)时,错算成3a+0.6,结果和正确答案差多少

小明算3*(a+0.6)时,错算成3a+0.6,结果和正确答案差多少 化简（2a-a*a)(a*a+4a+3)/(a*a*a+a*a)(a*a+a-6),并求当4a+3/a=0时,此分式的值 当a=1时,a-2a+3a-4a+5a…+99a-100a= 当a=-2时a+2a+3a+4a.+100a等于? 当a=-2时,a+2a+3a+4a.+100a等于多少 a=-2时,a+2a+3a+4a+.+100a等于多少 当a=-2时,a+2a+3a+4a+.+100a= a=-2时,a+2a+3a+4a+...+100a=多少 -a-7a+3a 计算(3a×a)+(2a×3a)+(3a×a)+[a×(a+2a+2a+2a+a)] (a 1)(a 2)(a 3)(a (a+2)(a+1)-a(a-3) 5a-a*a+[5a*a-3a]-6*[a*a-a] 3a^3+2a-0.75a^3+0.5a-0.6a^3-1/3a a=12急 当A=-3时,A-2A+3A-4A+``````+99A-100A的值是多少?当A=-3时,A-2A+3A-4A+````````````+99A-100A的值是多少? 当a=1时,求a-2a+3a-4a+...+99a-100a的值 当a=-2时,a-2a+3a-4a+5a…-100a= 3a.a等于