5/11X88+3/8x88=40+33=73
3/8X(17-1)=3/8X16=6
10-(2/7X14/9)-5/9=10-(4/9+5/9)=10-1=9
4. 5/6X1/8+1/6X1/8 =1/8X(5/6+1/6)=1/8X1=1/8
应该是这样吧
（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
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