-(+0.25)+3又1/5-(+3/4)+(-11/5)=

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-(+0.25)+3又1/5-(+3/4)+(-11/5)=
-(+0.25)+3又1/5-(+3/4)+(-11/5)=

-(+0.25)+3又1/5-(+3/4)+(-11/5)=
原式=-1/4+16/5-3/4-11/5
=(-1/4-3/4)+(16/5-11/5)
=-1+1
=0
7又1/5-0.5-8+2.8+1/2-5.6+6-4.4
=7.2-0.5-8+2.8+0.5-5.6+6-4.4
=(7.2+2.8)-8+(0.5-0.5)-(5.6+4.4)+6
=10-8+0-10+6
=6-8
=-2

-(+0.25)+3又1/5-(+3/4)+(-11/5)
=-0.25 +16/5-3/4-11/5
=-1 +1
=0
望采纳

原式=-0.25+3.2-0.75-2.2=0