1+2+3+4+''''''''''''''''''''''''''''''''''''''''''''''''''''

1/3,2/3,1/3,1/4,2/4,3/4,2/4,1/4,( ),( ),( ),( ),( ),( ),( ) “1”“2”“3”“4” 1+2+3×4 2+2+3+4+1 1/4+3/4×2/3 1+1 2+2 3+1 4+4 51+1 比较大小(4/3)^1/3,2^2/3,(-2/3)^3,(3/4)^1/2 2+1+4 3+3+1 2(3+1)(3^2+1)(3^3+1)(3^4+1)(3^8+1)+1 1 2 4和1 2 3 已知一组数：-1/1,1/2,-2/2,1/2,-1/3,2/3,-3/3,2/3,-1/3,1/4,-2/4,3/4, (-4/3)*(-8+3/2-3/1)