问题 解答题
直接写得数
3
16
×
4
15
=
3
7
×21=
7
10
×
4
9
=
3
7
×
2
3
=
32×
3
8
=
8
13
×
5
6
=
3
4
×
8
9
=
8
25
×5=
答案

3
16
×
4
15
=
1
20
3
7
×21=9,
7
10
×
4
9
=
14
45
3
7
×
2
3
=
2
7
32×
3
8
=12,
8
13
×
5
6
=
20
39
3
4
×
8
9
=
2
3
8
25
×5=
8
5

单项选择题
单项选择题