Question

A soma (-2/3) - (+3/7) vale:
(A) 8/21 (B) 4/10 (C) 1/21 (D) -23/21

Answer 1

Resposta:

-23/21

Explicação passo-a-passo:

-2/3 = -14/21 e +3/7 = +9/21

-14/21 - 9/21 = -23/21