Question

Can someone help me with several questions?

1.) [-1] -[0]
2.) [2.8]+ [2.8]
3. [-3/4] - [1/4]
4.[6] - [-6]
that's it if u can give the explanation that would be great ​

Answer 1

1.) -1

2.) 5.6

3.) -1

4.) 12