Сократите дроби 45/90, 22/44, 35/140, 77/220, 51/340, 13/169, 45/270, 103/3090, 270/5400, 420/36000.

1. $\frac{45}{90} = \frac{45 \div 45}{90 \div 45} = \frac{1}{2}$ 2. $\frac{22}{44} = \frac{22 \div 22}{44 \div 22} = \frac{1}{2}$ 3. $\frac{35}{140} = \frac{35 \div 35}{140 \div 35} = \frac{1}{4}$ 4. $\frac{77}{220} = \frac{77 \div 11}{220 \div 11} = \frac{7}{20}$ 5. $\frac{51}{340} = \frac{51 \div 17}{340 \div 17} = \frac{3}{20}$ 6. $\frac{13}{169} = \frac{13 \div 13}{169 \div 13} = \frac{1}{13}$ 7. $\frac{45}{270} = \frac{45 \div 45}{270 \div 45} = \frac{1}{6}$ 8. $\frac{103}{3090} = \frac{103 \div 103}{3090 \div 103} = \frac{1}{30}$ 9. $\frac{270}{5400} = \frac{270 \div 270}{5400 \div 270} = \frac{1}{20}$ 10. $\frac{420}{36000} = \frac{420 \div 60}{36000 \div 60} = \frac{7}{600}$ **Ответ:** 1. $\frac{1}{2}$ 2. $\frac{1}{2}$ 3. $\frac{1}{4}$ 4. $\frac{7}{20}$ 5. $\frac{3}{20}$ 6. $\frac{1}{13}$ 7. $\frac{1}{6}$ 8. $\frac{1}{30}$ 9. $\frac{1}{20}$ 10. $\frac{7}{600}$