问题 解答题
直接写出得数.
9
10
×
20
27
=
5
12
×
9
10
=
4
5
×
7
20
=
2
15
×
9
20
=
7
15
=
1
7
×21=
4
9
×
3
8
=
5
14
×
7
8
=
19
100
×
10
19
=
9
20
×
5
21
=
答案

9
10
×
20
27
=
2
3
5
12
×
9
10
=
3
8
4
5
×
7
20
=
7
25
2
15
×
9
20
=
3
50
7
15
=
7
3
1
7
×21=3,
4
9
×
3
8
=
1
6
5
14
×
7
8
=
5
16
19
100
×
10
19
=
1
10
9
20
×
5
21
=
3
28

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