Ответ:

  1. \(8058 \cdot 70 = 564060\).

    \(564060 - 23569 = 540491\).

    \(540491 : 47 = 11499\).

    \(784 + 506 + 6796 = 8086\), \(8086 : 500 = 16.172\).

    \(11499 - 1 - 16.172 = 11481.828\).

  2. \(425 \cdot 206 = 87550\), \(57816 : 72 = 803\).

    \(87550 - 803 = 86747\).

  3. \(465 \cdot 204 = 94860\).

    \(22 \cdot 308 - 6692 = 6776 - 6692 = 84\).

    \(8904 : 84 = 106\).

    \(94860 - 106 = 94754\).

  4. \(1849 : 43 = 43\), \(1521 : 39 = 39\).

    \(43 - 39 = 4\).

    \(39 \cdot 4 \cdot 250 = 39000\).

Ответ: 1) 11481.828; 2) 86747; 3) 94754; 4) 39000.