Question

Допоможіть терміново! Будь ласка!!!!

Answer 1

$- 2.4 \times 4x = - 9.6x$

$- 0.6y \times ( - 0.9) = 0.54y$

$- 8a \times 2.5b = - 20ab$

$- 5x \times ( - 0.8y) \times 0.4z = \\ - 2 \times( - 0.8) \times xyz = 1.6xyz$

$\frac{9}{28} a \times \frac{7}{18} \times ( - b) = - \frac{9 \times 7}{28 \times 18} ab = \\ - \frac{1}{8} ab = - 0.125ab$

$2 \frac{5}{8} x \times ( - \frac{16}{63} y) = - \frac{21 \times 16}{8 \times 63} xy = - \frac{2}{3} xy$