Question

Qual expressão tem como valor – 10?) (a) + 30 – 10 + 20 – 10 (b) + 80 – 60 + 20 – 10 (c) + 10 – 20 + 10 – 10 (d) – 10 + 50 – 30 + 20 (e)) +100 – 50 + 20 – 10

Answer 1

→ Resolvendo as expressões

a) +30 -10 +20 -10 = +30  

b) +80 -60 +20 -10 = -30

c) +10 -20 +10 -10 = -10

d) -10 +50 -30 +20 = +30

e) +100 - 50 +20 -10 = +60

a alternativa C