问题 解答题
直接写出得数.
7
9
×1
=
5
9
×9
=
7
11
×
5
7
=
4
11
=
11
12
×
18
55
=
5
9
×99
=
1-
2
7
×
1
2
=
4
15
×
15
4
=
答案

7
9
×1
=
7
9
5
9
×9
=5
7
11
×
5
7
=
5
11
4
11
=0
11
12
×
18
55
=
3
10
5
9
×99
=55
1-
2
7
×
1
2
=
6
7
4
15
×
15
4
=1.

单项选择题
单项选择题