№1 Сократить дробь: 1) 6/40 2) 32/72 3) 16/72 4) 63/91

1. \(\frac{6}{40}=\frac{6:2}{40:2}=\frac{3}{20}\).
2. \(\frac{32}{72}=\frac{32:8}{72:8}=\frac{4}{9}\).
3. \(\frac{16}{72}=\frac{16:8}{72:8}=\frac{2}{9}\).
4. \(\frac{63}{91}=\frac{63:7}{91:7}=\frac{9}{13}\).

Ответ: 1) \(\frac{3}{20}\); 2) \(\frac{4}{9}\); 3) \(\frac{2}{9}\); 4) \(\frac{9}{13}\).