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Презентация :Числата до 20 .Събиране и изваждане без преминаване

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до 22

  1. 1. 0 1 > 9 ? 3 5 < ? 1
  2. 2. Дес. Ед. Число 1 1 11 Дес. Ед. Число 0 5 5
  3. 3. 11 + 5 20 10 + 10 20 8 + 11 20 3 + 17 20 13 + 6 20

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