8 + 10 =, 12, 17, 18, 19, 1 + 14 =, 13, 15, 16, 18, 9 + 1 =, 6, 9, 10, 11, 4 + 9 =, 7, 13, 14, 15, 5 + 0 =, 1, 2, 4, 5, 5 + 1 =, 3, 6, 9, 14, 1 + 11 =, 11, 12, 13, 15, 2 + 2 =, 2, 4, 5, 7, 3 + 17 =, 16, 17, 18, 20, 7 + 1 =, 5, 6, 8, 10, 8 + 8 =, 3, 11, 16, 15, 7 + 5 =, 12, 10, 14, 16, 9 + 6 =, 12, 13, 14, 15, 10 + 4 =, 7, 20, 14, 16, 6 + 7 =, 11, 12, 13, 14.
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Copia de Cálculo mental sumas sencillas
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