Question

40 + 20 + 60 - 80 + 70 - 50 - 80

Answer 1

40+20=60
60+60=120
120-80=40
40+70=110
110-50=60
60-80=-20
Ответ:-20

Answer 2

40 + 20 + 60 - 80 + 70 - 50 - 80=
1)40+20=60
2)60+60=120.
3)120-80=40
4)40+70=110
5)110-50=60
6)60-80=-20.
Ответ:-20