Г: 4/5 · 10; 5/8 : 1/4; 6 : 9/10; 3/5 · 5/7; 1/2 : 3/8. 4/7 · 7/8; 12/13 : 6; 3/4 · 8/9; 7/12 : 1/3; 3/8 : 3/4. 6 · 2/3; 3/5 · 1/9; 5/6 : 2/3; 7/9 · 3/7; 3/7 : 9/14.

При делении на дробь умножаем на обратную дробь.

1. 4/5 · 10 = 8; 5/8 : 1/4 = 5/2; 6 : 9/10 = 20/3; 3/5 · 5/7 = 3/7; 1/2 : 3/8 = 4/3.
2. 4/7 · 7/8 = 1/2; 12/13 : 6 = 2/13; 3/4 · 8/9 = 2/3; 7/12 : 1/3 = 7/4; 3/8 : 3/4 = 1/2.
3. 6 · 2/3 = 4; 3/5 · 1/9 = 1/15; 5/6 : 2/3 = 5/4; 7/9 · 3/7 = 1/3; 3/7 : 9/14 = 2/3.