(-0.5)+3又4分之1+2.75+(5又2分之1)怎么做

问题描述:

(-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