Can you tell the answer

Dear student,
Group A scored -34,12,3 in three rounds.
Total score of group A =(-34)+12+3=-19

Group B scored 15,5,-32 in three rounds.
Total score of group B=15+5+(-32)=-12

Clearly, -12>-19
 Thus, Group B scored more.

Yes, Integers can be added in any order.
As for example,
3+4+8=15
Also, 8+3+4=15

Regards!