问题描述:
(-2.8)-(+2.4)+(-1.2)-(-0.4)=?
(-2.8)-(+2.4)+(-1.2)-(-0.4)=?0-(+5)-(-6.8)+(-8.8)=?(-3.2)+(5.6)-(-3.2)+4.-{(-0.5)+(-550%}-16 -3/1+4/3-6/1-2/1
(-2.8)-(+2.4)+(-1.2)-(-0.4)=?0-(+5)-(-6.8)+(-8.8)=?(-3.2)+(5.6)-(-3.2)+4.-{(-0.5)+(-550%}-16 -3/1+4/3-6/1-2/1
问题解答:
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