Контрольные задания > Вычисления в пределах 1000 Вычисли удобным способом. 4 x 7 x 25 = 5 x 18 x 2 = 25 x 2 x 4 = 25 x 7 x 4 x 1 = 8×9×5× 2 = 5×7×4× 5 = 7×2×6× 5 = 3 x 4 x 25 x 3 = 9×5×3× 4 = 7×5×7×2= 11 x 10 x 2 = 2 x 17 x 4 x 5 = 5 x 29 x 2 x 2 = 6×4×5×3 = 9×2×6×5 = 2x7x5x5 = 3×5×9× 4 = 8 x 4 x 15 x 2 = 9×6×5×3 = 25 x 7 x 4 = 10 x 4 x 7 x 3 = 20 x 8 x 5 = 45 x 6 x 2 = 6 x 3 x 50 = 5×2×2×7 x 5 = 8 × 4 × 5 = 12 x 7 x 5 = 4 x 4 x 50 = 2 x 28 x 5 =
Вопрос:

Вычисления в пределах 1000 Вычисли удобным способом. 4 x 7 x 25 = 5 x 18 x 2 = 25 x 2 x 4 = 25 x 7 x 4 x 1 = 8×9×5× 2 = 5×7×4× 5 = 7×2×6× 5 = 3 x 4 x 25 x 3 = 9×5×3× 4 = 7×5×7×2= 11 x 10 x 2 = 2 x 17 x 4 x 5 = 5 x 29 x 2 x 2 = 6×4×5×3 = 9×2×6×5 = 2x7x5x5 = 3×5×9× 4 = 8 x 4 x 15 x 2 = 9×6×5×3 = 25 x 7 x 4 = 10 x 4 x 7 x 3 = 20 x 8 x 5 = 45 x 6 x 2 = 6 x 3 x 50 = 5×2×2×7 x 5 = 8 × 4 × 5 = 12 x 7 x 5 = 4 x 4 x 50 = 2 x 28 x 5 =

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Ответ:

Ответ: 700, 180, 200, 700, 720, 700, 420, 900, 540, 490, 220, 680, 580, 360, 540, 350, 540, 960, 810, 700, 840, 800, 540, 900, 700, 160, 420, 800, 280

Краткое пояснение: Умножаем числа, используя удобный порядок для упрощения вычислений.

Решение:

  • 4 × 7 × 25 = (4 × 25) × 7 = 100 × 7 = 700
  • 5 × 18 × 2 = 5 × 2 × 18 = 10 × 18 = 180
  • 25 × 2 × 4 = 25 × 4 × 2 = 100 × 2 = 200
  • 25 × 7 × 4 × 1 = 25 × 4 × 7 × 1= 100 × 7 = 700
  • 8 × 9 × 5 × 2 = 8 × 5 × 9 × 2 = 40 × 18 = 720
  • 5 × 7 × 4 × 5 = 5 × 5 × 7 × 4 = 25 × 28 = 700
  • 7 × 2 × 6 × 5 = 7 × 6 × 2 × 5 = 42 × 10 = 420
  • 3 × 4 × 25 × 3 = 3 × 3 × 4 × 25 = 9 × 100 = 900
  • 9 × 5 × 3 × 4 = 9 × 3 × 5 × 4 = 27 × 20 = 540
  • 7 × 5 × 7 × 2 = 7 × 7 × 5 × 2 = 49 × 10 = 490
  • 11 × 10 × 2 = 11 × 2 × 10 = 22 × 10 = 220
  • 2 × 17 × 4 × 5 = 2 × 4 × 17 × 5 = 8 × 85 = 680
  • 5 × 29 × 2 × 2 = 5 × 2 × 29 × 2 = 10 × 58 = 580
  • 6 × 4 × 5 × 3 = 6 × 3 × 4 × 5 = 18 × 20 = 360
  • 9 × 2 × 6 × 5 = 9 × 6 × 2 × 5 = 54 × 10 = 540
  • 2 × 7 × 5 × 5 = 2 × 5 × 7 × 5 = 10 × 35 = 350
  • 3 × 5 × 9 × 4 = 3 × 9 × 5 × 4 = 27 × 20 = 540
  • 8 × 4 × 15 × 2 = 8 × 15 × 4 × 2 = 120 × 8 = 960
  • 9 × 6 × 5 × 3 = 9 × 3 × 6 × 5 = 27 × 30 = 810
  • 25 × 7 × 4 = 25 × 4 × 7 = 100 × 7 = 700
  • 10 × 4 × 7 × 3 = 10 × 3 × 4 × 7 = 30 × 28 = 840
  • 20 × 8 × 5 = 20 × 5 × 8 = 100 × 8 = 800
  • 45 × 6 × 2 = 45 × 2 × 6 = 90 × 6 = 540
  • 6 × 3 × 50 = 6 × 50 × 3 = 300 × 3 = 900
  • 5 × 2 × 2 × 7 × 5 = 5 × 2 × 7 × 2 × 5 = 10 × 14 × 5 = 140 × 5 = 700
  • 8 × 4 × 5 = 8 × 5 × 4 = 40 × 4 = 160
  • 12 × 7 × 5 = 12 × 5 × 7 = 60 × 7 = 420
  • 4 × 4 × 50 = 4 × 50 × 4 = 200 × 4 = 800
  • 2 × 28 × 5 = 2 × 5 × 28 = 10 × 28 = 280

Ответ: 700, 180, 200, 700, 720, 700, 420, 900, 540, 490, 220, 680, 580, 360, 540, 350, 540, 960, 810, 700, 840, 800, 540, 900, 700, 160, 420, 800, 280

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