Ответ:
- \(\frac{11}{12}\cdot24=11\cdot2=22\).
- \(14\cdot\frac{23}{28}=\frac{1}{2}\cdot23=\frac{23}{2}=11\frac{1}{2}\).
- \(\frac{5}{21}\cdot12=\frac{60}{21}=\frac{20}{7}=2\frac{6}{7}\).
- \(\frac{11}{25}\cdot15=\frac{165}{25}=\frac{33}{5}=6\frac{3}{5}\).
Ответ: 1) \(22\); 2) \(11\frac{1}{2}\); 3) \(2\frac{6}{7}\); 4) \(6\frac{3}{5}\).
