3. Выполните действие: a. (1$$\frac{1}{24}$$-$$\frac{5}{12}$$)×(4$$\frac{1}{8}$$-3$$\frac{5}{24}$$).

a. $$(1\frac{1}{24}-\frac{5}{12})\times(4\frac{1}{8}-3\frac{5}{24})=(1\frac{1}{24}-\frac{10}{24})\times(4\frac{3}{24}-3\frac{5}{24})=\frac{25}{24}-\frac{10}{24}\times\frac{99}{24}-\frac{77}{24}=\frac{15}{24}\times\frac{22}{24}=\frac{330}{576}=\frac{55}{96}$$

Ответ:$$\frac{55}{96}$$