15×
2
3 =10;
1
4 ×
4
5 =
1
5 ; 35×
3
5 =21;
3
10 ×
5
6 =
1
4 ;
5
7 ×
7
5 =1;
1
5 ×
3
4 =
3
20 ;
5
6 ×18=15;
5
8 ×
2
3 =
5
12 . 故答案为:10;
1
5 ;21;
1
4 ;1;
3
20 ;15;
5
12 .
15×
2
3 =10;
1
4 ×
4
5 =
1
5 ; 35×
3
5 =21;
3
10 ×
5
6 =
1
4 ;
5
7 ×
7
5 =1;
1
5 ×
3
4 =
3
20 ;
5
6 ×18=15;
5
8 ×
2
3 =
5
12 . 故答案为:10;
1
5 ;21;
1
4 ;1;
3
20 ;15;
5
12 .