Expresar en forma de adicion y efectuar
a) (+15)-(-4)
b) (-9)-(-7)
c) (-5)-)-(+8)
d) (+13)-(+18)
a) (+15)-(-4)
b) (-9)-(-7)
c) (-5)-)-(+8)
d) (+13)-(+18)
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+15 + 4 = +19
b) (-9)-(-7)
-9 + 7 = -2
c) (-5)-)-(+8)
+5 - 8 = -3
d) (+13)-(+18)
+13 - 18 = -5
Nota:Recuerda la ley de signos en multiplicacion:
(-)(-) = (+)
Buen dia!
Atte:Cazador.