问题 解答题
计算下面各题.
2
7
×5
=
7
12
×9
=
2
25
×5
=
8
49
=
3
14
×21
=
36×
5
12
=
答案

2
7
×5
=
10
7
7
12
×9
=
21
4
2
25
×5
=
2
5
8
49
=
8
7
3
14
×21
=
9
2
36×
5
12
=15.

单项选择题
单项选择题 A3/A4型题