1. Сократите дроби: 1) 45/90; 22/44; 35/140; 77/220; 51/340; 13/104; 48/270; 103/3000; 270/5400; 430/100000; 2) 27/900; 60/440; 117/1300; 300/525; 1080/2640; 1250/1625; 3) 450/480; 327/351; 840/960; 264/312; 128/192; 501/1002.

Делим числитель и знаменатель каждой дроби на их общий делитель.

1) \(\frac{45}{90}=\frac12\); \(\frac{22}{44}=\frac12\); \(\frac{35}{140}=\frac14\); \(\frac{77}{220}=\frac7{20}\); \(\frac{51}{340}=\frac3{20}\); \(\frac{13}{104}=\frac18\); \(\frac{48}{270}=\frac8{45}\); \(\frac{103}{3000}\) — несократимая; \(\frac{270}{5400}=\frac1{20}\); \(\frac{430}{100000}=\frac{43}{10000}\).

2) \(\frac{27}{900}=\frac3{100}\); \(\frac{60}{440}=\frac3{22}\); \(\frac{117}{1300}=\frac9{100}\); \(\frac{300}{525}=\frac47\); \(\frac{1080}{2640}=\frac9{22}\); \(\frac{1250}{1625}=\frac{10}{13}\).

3) \(\frac{450}{480}=\frac{15}{16}\); \(\frac{327}{351}=\frac{109}{117}\); \(\frac{840}{960}=\frac78\); \(\frac{264}{312}=\frac{11}{13}\); \(\frac{128}{192}=\frac23\); \(\frac{501}{1002}=\frac12\).