Привести дробь к общему знаменателю 2/9 и 5/12; 2/7 и 3/14; 5/9 и 2/27:3/8 и 2/9:3/19 и 2/3:2/15 и 5/18:2/9 и 3/4 и 5/12: 5/16 и 7/12 и 4/15

1. 2/9 и 5/12 8/36 и 15/36

2. 2/7 и 3/14 12/42 и 9/42

3. 5/9 и 2/27 15/27 и 2/27

4. 3/8 и 2/9 27/72 и 16/72

5. 3/19 и 2/3 9/57 и 38/57

6. 2/15 и 5/18 12/90 и 25/90

7. 2/9 и 3/4 и 5/12 8/36 и 27/36 и 15/36

8. 5/16 и 7/12 и 4/15 75/240 и 140/240 и 64/240