👤

calculeaza apoi verificâ prin operatie inversâ a scâderi682-425 563-228. 975-639



Răspuns :

∅682-425=   257

⊕PROBA:
∅682-257=425
_________________
∅563-228=  335

⊕PROBA:
∅563-335=228
_________________
∅975-639=336

⊕PROBA:
∅975-336=639.

Succes!