Ответ:

  1. \(\frac{10}{9}=1\frac19\).
  2. \(\frac{15}{7}=2\frac17\).
  3. \(\frac{45}{10}=4\frac5{10}=4\frac12\).
  4. \(\frac{56}{4}=14\).
  5. \(\frac{87}{21}=4\frac3{21}=4\frac17\).

Ответ: 1) \(1\frac19\); 2) \(2\frac17\); 3) \(4\frac12\); 4) 14; 5) \(4\frac17\).