Контрольные задания > 1. Выполни действия, показав удобный способ вычислений стрелкой, как это сделано в образце. 34 ⋅ (10 ⋅ 2) = ? 19 ⋅ (10 ⋅ 5) = ? 27 ⋅ (3 ⋅ 10) = ? 12 ⋅ (7 ⋅ 10) = ? 23 ⋅ (10 ⋅ 3) = ? 45 ⋅ (2 ⋅ 10) = ?
Вопрос:

1. Выполни действия, показав удобный способ вычислений стрелкой, как это сделано в образце. 34 ⋅ (10 ⋅ 2) = ? 19 ⋅ (10 ⋅ 5) = ? 27 ⋅ (3 ⋅ 10) = ? 12 ⋅ (7 ⋅ 10) = ? 23 ⋅ (10 ⋅ 3) = ? 45 ⋅ (2 ⋅ 10) = ?

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Ответ:

Пошаговое решение:

  1. 34 ⋅ (10 ⋅ 2) = 34 ⋅ 20 = 680
  2. 19 ⋅ (10 ⋅ 5) = 19 ⋅ 50 = 950
  3. 27 ⋅ (3 ⋅ 10) = 27 ⋅ 30 = 810
  4. 12 ⋅ (7 ⋅ 10) = 12 ⋅ 70 = 840
  5. 23 ⋅ (10 ⋅ 3) = 23 ⋅ 30 = 690
  6. 45 ⋅ (2 ⋅ 10) = 45 ⋅ 20 = 900
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