а) ($$\frac{4}{5} + \frac{4}{9}$$) \cdot 9 = (\frac{36}{45} + \frac{20}{45}$$) \cdot 9 = \frac{56}{45} \cdot 9 = \frac{56}{5} = 11\frac{1}{5}
Ответ: $$11\frac{1}{5}$$
б) ($$2\frac{5}{8} + 7\frac{1}{3}$$) \cdot 6 = (\frac{21}{8} + \frac{22}{3}$$) \cdot 6 = (\frac{63}{24} + \frac{176}{24}$$) \cdot 6 = \frac{239}{24} \cdot 6 = \frac{239}{4} = 59\frac{3}{4}
Ответ: $$59\frac{3}{4}$$
в) ($$10 - 2\frac{1}{11}$$) \cdot 11 = ($$10 - \frac{23}{11}$$) \cdot 11 = (\frac{110}{11} - \frac{23}{11}$$) \cdot 11 = \frac{87}{11} \cdot 11 = 87
Ответ: 87
г) ($$8 - 1\frac{2}{5} \cdot 3$$) \cdot 25 = ($$8 - \frac{7}{5} \cdot 3$$) \cdot 25 = ($$8 - \frac{21}{5}$$) \cdot 25 = (\frac{40}{5} - \frac{21}{5}$$) \cdot 25 = \frac{19}{5} \cdot 25 = 19 \cdot 5 = 95
Ответ: 95