简算~】9又3/5÷3又1/5-1又5/8+55/64÷5/8
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1.=(9*5+3/5)÷(3*5+1/5)-(1*8+5/8)+55/64÷5/8 =48/5 ÷ 16/5 -13/8 +55/64 ÷5/8

=48/5 X 5/16-13/8+55/64 X 8/5=3-13/8+11/8=24/8-13/8+11/8=11/4

2.=38又7/18-56/5 X 10/3 + 1X5/3 -1/2 =38又7/18 - (112/3 - 5/3) - 1/2 = 38又7/18 - (107/3+1/2)

= 38又7/18 - (214/6 + 3/6)=38又7/18 - 36又1/6 = 38又7/18 - 36又3/18 =2又2/9 =20/9

3.=(1/40 + 8/40) X (5/1 X 9/5 -5/9 x1/5) =9/40 x (81/9 -1/9) =9/40 x 80/9 =2

4.=10 x 9/2 +10 x 31/5 -10 x 8/5=45+62-16=91

5.=(27/8 x 4/3 +2/19 x 57/10) x 10/51 =(9/2 +3/5) x 10/51 =9/2 x 50/51 +3/5 x 50/51

=45/51 + 6/51=1

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