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Completar la tabla teniendo en cuenta la informacion inicial?

Completar la tabla teniendo en cuenta la informacion inicial.

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7

A) a + b = - 2 - 3 = - 5

b + a = - 3 - 2 = - 5

b + 0 = - 3 + 0 = - 3

a + ( - a) = - 2 + 2 = 0

a + (b + c) = - 2 + ( - 3 + 5) = - 2 + 2 = 0

(a + b) + c = ( - 2 - 3) + 5 = - 5 + 5 = 0

B) a + b = - 6 - 2 = - 8

b + a = - 2 - 6 = - 8

b + 0 = - 2 + 0 = - 2

a + ( - a) = - 6 + 6 = 0

a + (b + c) = - 6 + ( - 2 + 3) = - 6 + 1 = - 5

(a + b) + c = ( - 6 - 2) + 3 = - 8 + 3 = - 5

C) a + b = - 7 - 8 = - 15

b + a = - 8 - 7 = - 15

b + 0 = - 8 + 0 = - 8

a + ( - a) = - 7 + 7 = 0

a + (b + c) = - 7 + ( - 8 - 1) = - 7 - 9 = - 16

(a + b) + c = ( - 7 - 8) + - 1 = - 15 - 1 = - 16.