Răspuns :
5 + ( - 7 ) - ( - 4 ) - ( - 4 ) =
5 - 7 - ( - 4 ) - ( - 4 ) =
5 - 7 + 4 - ( - 4 ) =
5 - 7 + 4 + 4 =
- 2 + 4 + 4 =
2 + 4 =
[tex]\boxed{\bold{6}}[/tex]
- 8 - ( - 6 ) - ( - 2 ) =
- 8 + 6 - ( - 2 ) =
- 8 + 6 + 2 =
- 2 + 2 =
[tex]\boxed{\bold{0}}[/tex]
5 - 7 - ( - 4 ) - ( - 4 ) =
5 - 7 + 4 - ( - 4 ) =
5 - 7 + 4 + 4 =
- 2 + 4 + 4 =
2 + 4 =
[tex]\boxed{\bold{6}}[/tex]
- 8 - ( - 6 ) - ( - 2 ) =
- 8 + 6 - ( - 2 ) =
- 8 + 6 + 2 =
- 2 + 2 =
[tex]\boxed{\bold{0}}[/tex]