Переместительное свойство умножения: m * n = n * m
a) m = -1,5, n = 2,4
m * n = -1,5 * 2,4 = -3,6
n * m = 2,4 * -1,5 = -3,6
-3,6 = -3,6
б) $$m = -4\frac{1}{5}$$, $$n = -3\frac{1}{7}$$
m * n = $$-4\frac{1}{5}$$ * $$-3\frac{1}{7}$$ = -$$\frac{21}{5}$$ * -$$\frac{22}{7}$$ = $$\frac{21 * 22}{5 * 7}$$ = $$\frac{3 * 22}{5}$$ = $$\frac{66}{5}$$ = $$13\frac{1}{5}$$
n * m = $$-3\frac{1}{7}$$ * $$-4\frac{1}{5}$$ = -$$\frac{22}{7}$$ * -$$\frac{21}{5}$$ = $$\frac{22 * 21}{7 * 5}$$ = $$\frac{22 * 3}{5}$$ = $$\frac{66}{5}$$ = $$13\frac{1}{5}$$
$$13\frac{1}{5}$$ = $$13\frac{1}{5}$$