Răspuns:
10.
766 984-61 045=705 939
Proba prin + =705 939+61 045=766 984
Proba prin +=61 045+705 939=766 984
Proba prin - =766 984-705 939=61 045
879 182-6 122=873 060
Proba prin + =873 060+6 122=879 182
Proba prin + = 6 122+873 060=879 182
Proba prin - = 879 182-873 060=6 122
84 121+15 878=99 999
Proba prin + =15 878+84 121=99 999
Proba prin - = 99 999-84 121=15 878
Proba prin - = 99 999-15 878= 84 121
56 543+432 340=488 883
Proba prin + = 432 340+56 543=488 883
Proba prin - =488 883-56 543=432 340
Proba prin - =488 883-432 340=56 543
11.
1) R:524 351
2) R:292 132
3) R:915 352
4) R:704 230
