Odpowiedź:
[tex] - 6 + 13 = 7 \\ - 7 + ( - 20) = - 7 - 20 = - 27 \\ 4 + ( - 8) = 4 - 8 = - 4 \\ 5 + ( - 20) = 5 - 20 = - 15 \\ 7 + ( - 6) = 7 - 6 = 1 \\ - 4 + 5 = 1 \\ 6 + ( - 14) = 6 - 14 = - 8 \\ 12 + ( - 9) = 12 - 9 = 3[/tex]
