Ответ:

1) 12+(9-5) = 12+4 = 16

2) (8+6)+10 = 14+10 = 24

3) 50-(9+1) = 50-10 = 40

4) (9+5)-(12-6) = 14-6 = 8

Ответ:

12 + (9-5)=8

8+6+10=24

50-(9+1)=40

(9+5)-(12-6)=8