Răspuns:
1)435+124=559
559-435=124
559-124=435
2)706-204=502
204+502=706
3)659+238=897
897-659=238
897-238=659
4)106+428=534
534-106=428
534-428=106
5)237+285=522
522-237=285
522-285=237
6)589-352=237
237+352=589
7)890-320=570
320+570=890
Sper că te-am ajutat!