Resposta :
Resposta:
- 67+54÷6‐82
-67+9-82
[tex]\rightarrow\boxed{\boxed{\sf{ - 140}}}\checkmark[/tex]
+8‐12‐26+10
18-12-26
18-38
[tex]\rightarrow\boxed{\boxed{\sf{ - 20}}}\checkmark[/tex]
(‐7²)‐34+31‐20
-7²-34+31-20
-49-34+31-20
[tex]\rightarrow\boxed{\boxed{\sf{ - 72}}}\checkmark[/tex]
Explicação passo-a-passo: