1/2+(-2/3)+4/5+(-1/2)+(-1/3) (-5.9)-(-6.1) 28-(-74) (-3.8)-(+7)
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1/2+(-2/3)+4/5+(-1/2)+(-1/3) (-5.9)-(-6.1) 28-(-74) (-3.8)-(+7)
1/2+(-2/3)+4/5+(-1/2)+(-1/3) (-5.9)-(-6.1) 28-(-74) (-3.8)-(+7)
1/2+(-2/3)+4/5+(-1/2)+(-1/3) (-5.9)-(-6.1) 28-(-74) (-3.8)-(+7)
1/2+(-2/3)+4/5+(-1/2)+(-1/3)=-1/5
(-5.9)-(-6.1)=0.2
28-(-74)=102
(-3.8)-(+7)=-10.8
-1/30;0。2;102;-10。8