2/1×1/2×3/1
4/5×4/2×3/1
20/4÷5/2
3/2×3/4×5/1
4/2×5/6×2/5
15/2÷3/2
16/3÷4/3
30/5÷5/5
20/2÷2/2
1/2×2/1
15/6
6/1
24/5
4/1
4/2
5/1
1/1
3/1
20/30
