Question

Resolva as expressões a seguir: a) –(–7) + (+15) – (+32) + (–40) – (–25) + (+40) = b) –497 – (–801) + (–92) + (–55) + (–2) – (+1)

Answer 1

Resposta:

a) 15 b)154

Explicação passo-a-passo:

a) –(–7) + (+15) – (+32) + (–40) – (–25) + (+40)

 +7+15-32+25 ("corta" -40 com +40)

=15

b) –497 – (–801) + (–92) + (–55) + (–2) – (+1)

-497+801-92-55-2-1

=154