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scrie numerele de 2 cifre la care produsul dintre zeci si unitati este acelasi cu cifra zecilor .



Răspuns :

11, 21, 31, 41, 51, 61, 71, 81, 91


11                                                                                                                       

21                                                                                                           

31                                                                                                   

41

51

61

71

81

91