Respuesta:
cula las adicciones (-15)+(-12)= -27
(+30)+(-17)=+13
(+12)+(61)=+73
(-73)+(+48)=-25
(+21)+(+19)=+40
(-7)+(+45)=+38
(-85)+(+59)=-26
(-90)+(-59)=-31
(+68)+(-76)=+8
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Respuesta:
cula las adicciones (-15)+(-12)= -27
(+30)+(-17)=+13
(+12)+(61)=+73
(-73)+(+48)=-25
(+21)+(+19)=+40
(-7)+(+45)=+38
(-85)+(+59)=-26
(-90)+(-59)=-31
(+68)+(-76)=+8