Resposta:
a) 18 : 2 - 5 x 6 – 4 =
18 : 2 – 30 – 4 =
9 – 30 – 4 =
9 – 34 =
25
b) 240 : 3 + 5 – 19 =
80 + 5 – 19 =
85 – 19 =
66
c) 270 : 9 – 3 + (11 + 25 x 2) =
270 : 9 – 3 + (11 + 50) =
270 : 9 – 3 + 61 =
30 – 3 + 61 =
- 3 + 91 =
88
d) 78 : 2 + (9 x 5) – 33 =
78 : 2 + 45 – 33 =
39 + 45 – 33 =
84 – 33 =
51
e) 2 x (7 – 4) – 12 : 3 + 25 =
2 x 3 – 12 : 3 + 25 =
6 – 12 : 3 + 25 =
6 – 4 + 25 =
- 4 + 31 =
27
Explicação passo a passo:
