Question

scrie toate numerele de doua cifre, care au suma unitatilor si zecilor 10, 9, 6, 8, 7

Answer 1

9=81,72,63....                                                                                                                       6=51,42,33.....
10=55,91 82.....              

8=53,44,26......

7=52,61......

Answer 2

suma 10:19,28,37,46,55,64,73,82,91
suma 9 :18,27,36,45,54,63,72,81,90
suma 8:17,26,35,44,53,62,71,80.
suma 7:16,25,34,43,52,61,70.
suma 6:15,24,33,42,51,60.