7. Найдите значение выражения: 4 - 2 1/4 * (1 1/3 - 5/6) : 10.

1. \(1\frac{1}{3} - \frac{5}{6} = \frac{4}{3} - \frac{5}{6} = \frac{8}{6} - \frac{5}{6} = \frac{3}{6} = \frac{1}{2}\) 2. \(2\frac{1}{4} \cdot \frac{1}{2} = \frac{9}{4} \cdot \frac{1}{2} = \frac{9}{8}\) 3. \(\frac{9}{8} : 10 = \frac{9}{8} \cdot \frac{1}{10} = \frac{9}{80}\) 4. \(4 - \frac{9}{80} = \frac{320}{80} - \frac{9}{80} = \frac{311}{80} = 3\frac{71}{80}\) Ответ: \(3\frac{71}{80}\)