4.17. Вычислите: A) 38 4 5 Б) 158 E) -336

A) \(\frac{2}{3} \cdot \frac{3}{8} = \frac{2 \cdot 3}{3 \cdot 8} = \frac{6}{24} = \frac{1}{4} = 0.25\) Б) \(\frac{4}{15} \cdot \frac{5}{8} = \frac{4 \cdot 5}{15 \cdot 8} = \frac{20}{120} = \frac{1}{6} \approx 0.167\) E) \(-3 \frac{3}{5} \cdot 1.2 = -3.6 \cdot 1.2 = -4.32\)