Resposta :
Olá, Boa tarde.
A) −1 −2 −3 = −6
B) −4 −5 −8 +10 = −7
C) −7 +20 −15 +20 −1 = 17
D) +8 −10 −7 +13 −14 +5 −6 = −11
E) −13 +7 −9 +5 −13 = −23
F) −20 +10 −10 +20 +14 −13 −1 = 0
G) −8 −10 +17 −3 +4 −7 +8 −1 = 0
H) −6 −7 −13 −26 +54 −2 = 0
Espero ter ajudado.