24 + 1 =, 25, 26, 23 - 2 =, 22, 21, 25 + 4 =, 28, 29, 29 - 6 =, 23, 24, 17 + 2 =, 18, 19, 28 - 5 =, 23, 24, 31 - 1 =, 29, 30, 16 + 3 =, 19, 18, 29 - 3 =, 26, 25, 26 - 3 =, 22, 23, 15 + 2 =, 17, 18, 24 - 3 =, 22, 21, 27 - 5 =, 23, 22, 29 - 8 =, 21, 22, 27 - 3 =, 23, 24

Calculează! Adunarea și scăderea numerelor naturale 10-31, fără trecere peste ordin

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