24 is wrong.
The others are right.
21. 25+18+(-23)= 20
22. -65+(-2)+9= -58
23. 80+15+(-26)= 69
24. -5+4+(-27)= 18
25. -29+12+44= 27
30. 30+(-9)+1= 22
32. 51+ (-21)+-12)= 18
3 answers
-28
Right.