Ответ:

  1. \(14.72+8.39-5.46=23.11-5.46=17.65\);
  2. \(25.8\cdot0.35=9.03\);
  3. \(9.63:0.9=10.7\);
  4. \(16.4-(3.8+2.15)=16.4-5.95=10.45\).

Ответ: 17,65; 9,03; 10,7; 10,45.