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-6 + 5 = -4 + 3
-1 = -1
b) (-2+5)+-3=-2+(5+-3)
3 + -3= -2 + 2
0 = 0
Como se trata de operacionews con suma y resta, porsupuesto que se cumple la propiedad asociativa; veamos:
a) (-4) + (-2) + (+5)
[(-4) + (-2)] + (+5)= (-4) + [(-2) + (+5)]=
[-4-2] + 5= -4 + [-2 + 5 ]=
[-6] + 5= -4 + [3]=
-1 -1
b) (-2) + (+5) + (-3)
[(-2) + (+5)] + (-3)= (-2) + [(+5) + (-3)]=
[-2 + 5] -3= -2 + [5 - 3]=
[3] -3= -2 + [2]=
0 0