1/9÷1/6÷3/5=1/9×6×5/3=10/9=1又1/92/5÷4/7×5/7=2/5×7/4×5/7=1/2(5/12+1/27)×27+5/8=5/12×27+1/27×27+5/8=45/4+1+5/辅锭滇瓜鄄盖殿睡东精8=12又7/8