Используем распределительное свойство умножения:

1. a) 12 × $$2\frac{2}{3}$$ = 12 × $$(2 + \frac{2}{3})$$ = 12 × 2 + 12 ×$$\frac{2}{3}$$ = 24 + $$\frac{12 \times 2}{3}$$ = 24 + $$\frac{24}{3}$$ = 24 + 8 = 32
2. б) 4 × $$6\frac{5}{18}$$ = 4 × $$(6 + \frac{5}{18})$$ = 4 × 6 + 4 × $$\frac{5}{18}$$ = 24 + $$\frac{4 \times 5}{18}$$ = 24 + $$\frac{20}{18}$$ = 24 + $$\frac{10}{9}$$ = 24 + $$1\frac{1}{9}$$ = $$25\frac{1}{9}$$