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Corina are 7 alune,Vlad cu 6 mai mult,iar Irina cu 4 mai putine decat Vlad.Cate alune are Irina?

Răspuns :

Irina are 9mere.<br />7+6=13.<br />13-4=9<br />
1.cate alune are Vlad?
7+6=13
2.cate alune are Irina?
13-4=9