(-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
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(-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)=?
(-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)=?(-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
1.-2.8+(-1.2)-(2.4-0.4)=-4-2=-6 2.-5-(-6.8+8.8)=-7 3.(-3.2)-(-3.2)+5.6+4.6=10.2 4.-{(-0.5)+(-5.5}-16 -3/1+4/3-6/1-2/1=-(-6)-16+1-8=-17
(-2.8)-(+2.4)+(-1.2)-(-0.4)= -2.8-2.4-1.2+0.4= -6 0-(+5)-(-6.8)+(-8.8)= -5-6.8-8.8= -10.6 (-3.2)+(5.6)-(-3.2)+4.6= -3.2+5.6+3.2+4.6=10.2 -{(-0.5)+(-550%}-16= -(-0.5-5.5)-16=-10 -3/1+4/3-6/1-2/1= -3+4/3-6-2= -10+1/3=9+(2/3)