г) (-4+3)(-9+8); д) 1(-) -(-1) ·1; e) 1.(-153-189.).

Ответ: г) -1/6; д) 7/20; е) -3/28

Решение:

г) \[(-4\frac{1}{2} + 3\frac{3}{4}) \cdot (-9\frac{6}{7} + 8\frac{4}{7}) = (-\frac{9}{2} + \frac{15}{4}) \cdot (-\frac{69}{7} + \frac{60}{7}) = (-\frac{18}{4} + \frac{15}{4}) \cdot (-\frac{9}{7}) = (-\frac{3}{4}) \cdot (-\frac{9}{7}) = \frac{3 \cdot 9}{4 \cdot 7} = \frac{27}{28}\]

д) \[(1\frac{1}{4} \cdot (-\frac{4}{5})) - ((-1\frac{7}{8}) \cdot 1\frac{3}{5}) = (\frac{5}{4} \cdot (-\frac{4}{5})) - ((\frac{-15}{8}) \cdot \frac{8}{5}) = -1 - (\frac{-15}{5}) = -1 - (-3) = -1 + 3 = 2\]

е) \[(1\frac{1}{11} \cdot (-15,3 - 18,9) \cdot \frac{5}{7}) = (\frac{12}{11} \cdot (-34,2) \cdot \frac{5}{7}) = -\frac{12}{11} \cdot \frac{342}{10} \cdot \frac{5}{7} = -\frac{12}{11} \cdot \frac{171}{5} \cdot \frac{5}{7} = -\frac{12}{11} \cdot \frac{171}{7} = -\frac{2052}{77}\]

Ответ: г) -1/6; д) 7/20; е) -3/28