Контрольные задания > 1. Закончи записи. 2.6+2-2・ 2-7+2-2・☐ 2-10-2-2・☐ 2・8-2-2・☐ 2-8+2-20 2-9+2-2.0 2・0-2-2-4 2+2=2.10
Вопрос:

1. Закончи записи. 2.6+2-2・ 2-7+2-2・☐ 2-10-2-2・☐ 2・8-2-2・☐ 2-8+2-20 2-9+2-2.0 2・0-2-2-4 2+2=2.10

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Ответ:

Краткое пояснение: Необходимо выполнить действия сложения и вычитания в заданном порядке, чтобы завершить записи.

Решение:

  • 2 + 6 + 2 = 8, 8 - 2 = 6. Ответ: 2 + 6 + 2 - 2 = 2 + 6 = 2 ⋅ 3
  • 2 + 7 + 2 = 9, 9 - 2 = 7. Ответ: 2 + 7 + 2 - 2 = 2 + 7 = 2 ⋅ 3,5
  • 2 ⋅ 10 - 2 = 20, 20 - 2 = 18, 18 = 2 ⋅ 9. Ответ: 2 ⋅ 10 - 2 - 2 = 2 ⋅ 4 = 2 ⋅ 9
  • 2 ⋅ 8 - 2 = 16, 16 - 2 = 14, 14 = 2 ⋅ 7. Ответ: 2 ⋅ 8 - 2 - 2 = 2 ⋅ 6 = 2 ⋅ 7
  • 2 ⋅ 8 + 2 = 16, 16 + 2 = 18, 18 = 2 ⋅ 9. Ответ: 2 ⋅ 8 + 2 - 2 ⋅ 0 = 2 ⋅ 9
  • 2 ⋅ 9 + 2 = 18, 18 + 2 = 20, 20 = 2 ⋅ 10. Ответ: 2 ⋅ 9 + 2 - 2 ⋅ 0 = 2 ⋅ 10
  • 2 ⋅ 2 = 4, 4 - 2 - 2 = 4. Ответ: 2 ⋅ 0 - 2 - 2 = 2 ⋅ 0 - 2 ⋅ 4
  • 2 ⋅ 0 + 2 = 0, 0 + 2 = 2. Ответ: 2 ⋅ ☐ + 2 = 2 ⋅ 10, 2 + 2 = 2 ⋅ 1
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