Salutare!
2 + 4 - 34 + 67.890 + 12.365 - 78 =
= 6 - 34 + 67.890 + 12.365 - 78 =
= -28 + 67.890 + 12.365 - 78 =
= 67.862 + 12.365 - 78 =
= 80.227 - 78 =
= 80.149