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calculeaza apoi verifica prin opertia innversa a scaderi 682 -425 563-228 975-639

Răspuns :

682-425=257 operatia inversa : 257+425=682 
563-228=335 operatia inversa : 335+228=563 
975-639=336 operatia inversa: 336+639=975
682-425=257
257+425=682
563-228=335
335+228=563
975-639=336
336+639=975