(-0.5)+3又4分之1+2.75+(5又2分之1)怎么做

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(-0.5)+3又4分之1+2.75+(5又2分之1)怎么做

(-0.5)+3又4分之1+2.75+(5又2分之1)怎么做
(-0.5)+3又4分之1+2.75+(5又2分之1)怎么做

(-0.5)+3又4分之1+2.75+(5又2分之1)怎么做
原式
=-0.5+3.25+2.75+5.5
=5.5-0.5+(3.25+2.75)
=5+6
=11