问题 解答题
2
9
×
4
5
=
4
7
×
7
12
=
2
5
×
5
8
=
3
10
×
4
9
=
7
8
×
24
35
=
15×
9
20
=
5
12
×36
=
2
5
×
3
4
=
答案

2
9
×
4
5
=
8
45
4
7
×
7
12
=
1
3
2
5
×
5
8
=
1
4
3
10
×
4
9
=
2
15
7
8
×
24
35
=
3
5
15×
9
20
=
27
4
5
12
×36
=15
2
5
×
3
4
=
3
10

单项选择题 A1/A2型题
解答题