Respuesta:
(+9 )+ (-20)
Aplica la Propiedad: a+(-b)= a-b
9+(-20)= 9-20
= 9-20
Restar: 9-20= -11
= -11
Rta:/ La Suma de (+9)+(-20) Nos da -11
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Respuesta:
(+9 )+ (-20)
Aplica la Propiedad: a+(-b)= a-b
9+(-20)= 9-20
= 9-20
Restar: 9-20= -11
= -11
Rta:/ La Suma de (+9)+(-20) Nos da -11