用简便方法计算:(5/6-5/9)×18/5 计算过程如下＝5/6×18/5-5/9×18/5＝3-2＝1
用简便方法计算:(5/6-5/9)×18/5 。(5/6-5/9)×18/5=(5/6)*(18/5)-(5/9)*(/8/5)=3-2=1
