101*5/11+103*3/11+102*3/11
=101*5/11+（103+102）*3/11
=101*5/11+205*3/11
=101*5/11+123*5/11
=（101+123）×5/11
=224×5/11
=220×5/11+4×5/11
=100+20/11
=101又9/11