问题 解答题
直接写出得数
5
9
×15=
3
5
×2=
1
4
×
4
5
=
1
9
×
3
7
=
3
20
=
2
5
×
15
4
=
4
17
×34=
8
21
×
7
16
=
3
4
×
1
5
=
5
6
×
2
15
=
6
11
×
1
12
=
3
22
×
11
13
=
答案

5
9
×15=
25
3
3
5
×2=
6
5
1
4
×
4
5
=
1
5
1
9
×
3
7
=
1
21

3
20
=
3
20
2
5
×
15
4
=
3
2
4
17
×34=8;
8
21
×
7
16
=
1
6

3
4
×
1
5
=
3
20
5
6
×
2
15
=
1
9
6
11
×
1
12
=
1
22
3
22
×
11
13
=
3
26

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