1.3/8,3/24,0.375,
2.24*2,12*1/3,乘
3.35,30
4.1/2,3
5.30,1/30
6.1/5,19/120,57/360,5
7.123/270,123/147
8.10/9,2/9
9.3
二
1.x
2.x
3.f
4.x
1.3/8,3/24,0.375,
2.24*2,12*1/3,乘
3.35,30
4.1/2,3
5.30,1/30
6.1/5,19/120,57/360,5
7.123/270,123/147
8.10/9,2/9
9.3
二
1.x
2.x
3.f
4.x