用简便的方法计算5s0P.P6X5Z:o1s
9÷ [0.3×（9-7.5）]5s0P.P6X5Z:o1s
算式：提示7](\/A/U6s5s0P.P6X5Z:o1s
=)R+n.`)y0h;M1x5s0P.P6X5Z:o1s