（8/15÷0.32--7/9×0.375）÷1又3/8 =(8/15÷32/100-7/9×375/1000)÷11/8=(8/15×25/4-7/9×3/8)×8/11=(10/3-7/24)×8/11=73/24*8/11=73/33（1又8/13×13/42＋2/3）÷（11--1又2/3）=(21/13×13/42+2/3)÷(33/3-5...