你上面那个是【（x乘于0.25x）=0.625】还是直接只是【0.25x=0.625】啊?注：以下的“^2”为平方.“√”为开方.①x0.25x=0.6250.25x^2=0.625x^2=0.625÷0.25x^2=2.5x=√2.5x≈1.5814②0.25x=0.625x=0.625÷0.25x=2.5...