5.559 Сократите: 1) \(\frac{390}{650}\), 2) \(\frac{4550}{5550}\), 3) \(\frac{570}{13310}\), 4) \(\frac{4200}{4550}\)

1) \(\frac{390}{650}\) = \(\frac{39}{65}\) = \(\frac{3 \cdot 13}{5 \cdot 13}\) = \(\frac{3}{5}\)

2) \(\frac{4550}{5550}\) = \(\frac{455}{555}\) = \(\frac{91 \cdot 5}{111 \cdot 5}\) = \(\frac{91}{111}\)

3) \(\frac{570}{13310}\) = \(\frac{57}{1331}\)

4) \(\frac{4200}{4550}\) = \(\frac{420}{455}\) = \(\frac{84 \cdot 5}{91 \cdot 5}\) = \(\frac{84}{91}\) = \(\frac{12 \cdot 7}{13 \cdot 7}\) = \(\frac{12}{13}\)

Ответ: 1) \(\frac{3}{5}\); 2) \(\frac{91}{111}\); 3) \(\frac{57}{1331}\); 4) \(\frac{12}{13}\)