- $$1 \frac{3}{4} = \frac{7}{4}$$
Применим правило умножения дробей: $$\frac{a}{b} \cdot \frac{c}{d} = \frac{a \cdot c}{b \cdot d}$$.
- $$1 \frac{3}{4} = \frac{7}{4}$$
- $$\frac{10}{11} \cdot \frac{13}{20} = \frac{10 \cdot 13}{11 \cdot 20} = \frac{130}{220} = \frac{13}{22}$$
- $$\frac{6}{7} \cdot \frac{14}{15} = \frac{6 \cdot 14}{7 \cdot 15} = \frac{84}{105} = \frac{4 \cdot 21}{5 \cdot 21} = \frac{4}{5}$$
- $$\frac{5}{26} \cdot \frac{13}{18} = \frac{5 \cdot 13}{26 \cdot 18} = \frac{5 \cdot 13}{2 \cdot 13 \cdot 18} = \frac{5}{2 \cdot 18} = \frac{5}{36}$$
- $$\frac{2}{3} \cdot \frac{8}{15} = \frac{2 \cdot 8}{3 \cdot 15} = \frac{16}{45}$$
Ответ:
- $$\frac{7}{4}$$
- $$\frac{13}{22}$$
- $$\frac{4}{5}$$
- $$\frac{5}{36}$$
- $$\frac{16}{45}$$