7 + 3 , 10, 9 + 6 , 15, 6 + 5 , 11, 8 + 6, 14, 8 + 9, 17, 4 + 9, 13, 8 + 8 , 16, 8 + 4, 12, 13 + 7, 20, 9 + 9, 18.

Adunarea numerelor naturale 0 - 20 cu trecere peste ordin

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