Сравните значения выражений:
а) 2,06 \(\cdot\) 3,05 и 21,28 : 3,5
6,283 > 6,08

б) 97,2 : 2,4 и 62 - 21,6
40,5 > 40,4

в) \(\frac{1}{2} + \frac{1}{5}\) и \(\frac{1}{3} + \frac{1}{4}\)
\(\frac{1}{2} + \frac{1}{5} = \frac{5}{10} + \frac{2}{10} = \frac{7}{10}\)
\(\frac{1}{3} + \frac{1}{4} = \frac{4}{12} + \frac{3}{12} = \frac{7}{12}\)
\(\frac{7}{10}\) > \(\frac{7}{12}\)

г) \(16 - 3\frac{5}{8}\) и \(15 - 2\frac{1}{4}\)
\(16 - 3\frac{5}{8} = 15 + 1 - 3\frac{5}{8} = 15 - 3 + \frac{8}{8} - \frac{5}{8} = 12 + \frac{3}{8} = 12\frac{3}{8}\)
\(15 - 2\frac{1}{4} = 14 + 1 - 2\frac{1}{4} = 14 - 2 + \frac{4}{4} - \frac{1}{4} = 12 + \frac{3}{4} = 12\frac{3}{4}\)
\(12\frac{3}{8}\) < \(12\frac{3}{4}\).