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