7/16×8/11+9/10÷11/8
=7/16×8/11+9/10×8/11
=1/11×(7/2+36/5)
=1/11×107/10
=107/110
9.5×17-3又5/9×18
=10×17-0.5×17-3×18-5/9×18
=170-8.5-54-10
=97.5