5. Вычислите: 3\frac{6}{11}-1\frac{5}{11}⋅1\frac{1}{4}.

Вычислим 3\frac{6}{11}-1\frac{5}{11}⋅1\frac{1}{4}.

1) $$1\frac{5}{11} \cdot 1\frac{1}{4} = \frac{16}{11} \cdot \frac{5}{4} = \frac{16 \cdot 5}{11 \cdot 4} = \frac{4 \cdot 5}{11 \cdot 1} = \frac{20}{11} = 1\frac{9}{11}$$.2) $$3\frac{6}{11} - 1\frac{9}{11} = 2\frac{17}{11} - 1\frac{9}{11} = 1\frac{8}{11}$$.

Ответ: 1\frac{8}{11}