原式=-2又5/11-[2又1/3-(1又5/11-2.35)-11.5]-5又2/3
=-27/11-[7/3-(16/11-47/20)-23/2]-17/3
=-27/11-(7/3-16/11+47/20-23/2)-17/3
=-27/11-7/3+16/11-47/20+23/2-17/3
=-(27/11-16/11)-(7/3+17/3)+(23/2-47/20)
=-1-8+183/20
=183/20-9
=3/20
-2又5/11-{2又1/3-(1又5/11-2.35)-11.5}-5又2/3
=-27/11-{7/3-(16/11-47/20)-23/2}17/3
=-27/11-(7/3-16/11+47/20-23/2)-17/3
=-27/11-7/3+16/11-47/20+23/2-17/3
=-(27/11-16/11)-(7/3+17/3)+(23/2-47/20)
=-1-8+183/20
=183/20-9
=3/20
你好:原式=-2又5/11-[2又1/3-(1又5/11-2.35)-11.5]-5又2/3
=-27/11-[7/3-(16/11-47/20)-23/2]-17/3
=-27/11-(7/3-16/11+47/20-23/2)-17/3
=-27/11-7/3+16/11-47/20+23/2-17/3
=-(27/11-16/11)-(7/3+17/3)+(23/2-47/20)
=-1-8+183/20
=183/20-9
=3/20
答案见下面!!!!!
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