2¾+0.25+(-7½)+(-2¼)+1.5+(-2.75)简算

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2¾+0.25+(-7½)+(-2¼)+1.5+(-2.75)简算

2¾+0.25+(-7½)+(-2¼)+1.5+(-2.75)简算
2¾+0.25+(-7½)+(-2¼)+1.5+(-2.75)简算

2¾+0.25+(-7½)+(-2¼)+1.5+(-2.75)简算
2又3/4+0.25+(-7又1/2)+(-2又1/4)+1.5+(-2.75)
=2.75+0.25+(-7.5)+(-2.25)+1.5+(-2.75)
=[2.75+(-2.75)]+(0.25+1.5)+[(-7.5)+(-2.25)]
=0+1.75+(-9.75)
=-(9.75-1.75)
=-8