11分之8减9分之4减9分之5加11分之3简便算解:采用结合律,原式=8/11-4/9-5/9+3/11=(8/11+3/11)-(4/9+5/9)=11/11-9/9=1-1=0
11分之8减9分之4减9分之5加11分之3简便算=(8/11+3/11)-(4/9+5/9)=1-1=0
如图