Ответ:

  1. \(56 \cdot 24 = 56 \cdot (20 + 4) = 1120 + 224 = 1344\).
  2. \(37 \cdot 85 = 37 \cdot (80 + 5) = 2960 + 185 = 3145\).
  3. \(235 \cdot 48 = 235 \cdot (50 - 2) = 11750 - 470 = 11280\).
  4. \(37 \cdot 129 = 37 \cdot (130 - 1) = 4810 - 37 = 4773\).
  5. \(203 \cdot 504 = 203 \cdot (500 + 4) = 101500 + 812 = 102312\).
  6. \(210 \cdot 3500 = 735000\).
  7. \(2103 \cdot 7214 = 15171042\).
  8. \(5008 \cdot 3020 = 15124160\).

Ответ: а) 1344; б) 3145; в) 11280; г) 4773; д) 102312; е) 735000; ж) 15171042; з) 15124160.