Răspuns :
294+208=502
Verificare:
502-208=294
502-294=208
582+338=920
Verificare:
920-338=582
920-582=338
456+298=754
Verificare:
754-298=456
754-456=298
Verificare:
502-208=294
502-294=208
582+338=920
Verificare:
920-338=582
920-582=338
456+298=754
Verificare:
754-298=456
754-456=298