2. -29+30=1

Question

3. -32+9=-23

4. 10+37=47

5. 34+22=56

7. -4+(-50)= -54

9. 26+(-9)=17

11. 12+(-22) -10

13. -36+(-36)=-72

15. -34+17= -17

20. -39+(-40)= -79

Answer 1

All are right. :-)

Answer 2

Thanks :)

Answer 3

You're welcome.