下面各题，能用简便方法计算的用简便方法计算：
2.5×12.5×32              6.4÷2.5÷0.4               5.4×0.36+0.64×5.4
9÷0.75+9÷0.25            17.2﹣0.71﹣0.29            8.6+1.4÷2.5．