72乘(1-9分之2)除(1-11分之4)-72
问题描述：
72乘(1-9分之2)除(1-11分之4)-72
答
72×(1-9分之2)÷(1-11分之4)-72
=72×7/9÷7/11-72
=56÷7/11-72
=88-72
=16