10) \(21\frac{1}{4} : 5 =\)

10) \(21\frac{1}{4} : 5 = \frac{85}{4} : 5 = \frac{85}{4} \cdot \frac{1}{5} = \frac{17}{4} = 4\frac{1}{4}\)
Ответ: \(4\frac{1}{4}\)