（5/11+3/8)x88
=5/11x88+3/8x88
=40+33
=73

17x3/8-3/8
=(17-1)x3/8
=16x3/8
=6

10-2/7÷9/14-5/9
=10-2/7x14/9-5/9
=10-4/9-5/9
=10-(4/9+5/9)
=10-1
=9

5/6x1/8+1/6÷8
=5/6x1/8+1/6x1/8
=(5/6+1/6)x1/8
=1/8