Вопрос:

123. Вычислить: 1) 413×12+97×45; 2)209×37-29×101+324×9; 3) (2103 +278) ×38; 4) 1935+1876×23; 5) 1727×30-900×39; 6) 47027×24+31352-2408×356; 7) 140013-25×3571-119×309; 8) 512×(3159-846-2312); 9) (10000-875)×(10201-3785).

Ответ:

1.

  1. \(413 \times 12 + 97 \times 45 = 4956 + 4365 = 9321\)
  2. \(209 \times 37 - 29 \times 101 + 324 \times 9 = 7733 - 2929 + 2916 = 4804 + 2916 = 7720\)
  3. \((2103 + 278) \times 38 = 2381 \times 38 = 90478\)
  4. \(1935 + 1876 \times 23 = 1935 + 43148 = 45083\)
  5. \(1727 \times 30 - 900 \times 39 = 51810 - 35100 = 16710\)
  6. \(47027 \times 24 + 31352 - 2408 \times 356 = 1128648 + 31352 - 857248 = 1160000 - 857248 = 302752\)
  7. \(140013 - 25 \times 3571 - 119 \times 309 = 140013 - 89275 - 36771 = 50738 - 36771 = 13967\)
  8. \(512 \times (3159 - 846 - 2312) = 512 \times (2313 - 2312) = 512 \times 1 = 512\)
  9. \((10000 - 875) \times (10201 - 3785) = 9125 \times 6416 = 58520000\)