Ответ:

  1. \(−0,25−3\frac{1}{2}=−0,25−3,5=−3,75\).
  2. \(−9\frac{1}{4}−0,75=−9,25−0,75=−10\).
  3. \(−3−2\frac{3}{5}=−3−2,6=−5,6\).
  4. \(−27−5\frac{9}{20}=−27−5,45=−32,45\).
  5. \(−16\frac{8}{25}−7,3=−16,32−7,3=−23,62\).
  6. \(−5,8−17\frac{3}{4}=−5,8−17,75=−23,55\).
  7. \(−4,75−3\frac{9}{20}=−4,75−3,45=−8,2\).
  8. \(−2\frac{3}{5}−9,4=−2,6−9,4=−12\).

Жауабы: 1) −3,75; 2) −10; 3) −5,6; 4) −32,45; 5) −23,62; 6) −23,55; 7) −8,2; 8) −12.