CLARABRAHG547GO CLARABRAHG547GO Matemática Respondido 01.Calcule o valor de: a) – 3 + 5 – 2 – 9 = c) – 3 + 5 – 2 – 9 = b) 7+ 8 – 6 – 4 – 3 = d) – 5 + 4 – 2 – 7 + 3 =