Question

Resolver (-13)+(-7), (-9)+15, (-14)+17, (-17)+(-6), 28+(-29)

Answer 1

$- 13 - 7 = - 20 \\ - 9 + 15 = 6 \\ - 14 - 17 = 3 \\ - 17 - 6 = - 23 \\ 28 - 29 = - 1$

acuérdate de la ley de signos en estos casos

+ × + = +

+ × - = -

- × + = -

- × - = +