31×5/6+23÷6/5;简单计算方案:31×5/6+23÷6/5=31x5/6+23x5/5=5/6x(31+23)=5/6x54=45
其实就是23乘以23,口算都可以算出来了!
=56÷56×23×23=1×23×23=529