问题 解答题
直接写得数
5
9
×15=

3
5
×2=

1
4
×
4
5
=

1
9
×
3
7
=

7
12
×
3
4
=
3
20
=
2
5
×
15
4
=
4
17
×34=
8
21
×
7
16
=
1
20
×
2
3
=
3
4
×
1
5
=
5
6
×
2
15
=
5
6
÷10=
6
13
÷
5
26
=
5
8
=
8
9
÷4=
2
3
=
22÷
11
12
=
9
53
÷
9
53
=
2
5
÷0.4=
答案

5
9
×15=
25
3
3
5
×2=
6
5
1
4
×
4
5
=
1
5
1
9
×
3
7
=
1
21
7
12
×
3
4
=
7
16

3
20
=
3
20
2
5
×
15
4
=
3
2
4
17
×34=8;
8
21
×
7
16
=
1
6
1
20
×
2
3
=
1
30

3
4
×
1
5
=
3
20
5
6
×
2
15
=
1
9
5
6
÷10=
1
12
6
13
÷
5
26
=
12
5
;0÷
5
8
=0;

8
9
÷4=
2
9
;1÷
2
3
=
3
2
; 22÷
11
12
=24;
9
53
÷
9
53
=1;
2
5
÷0.4=1.

单项选择题
单项选择题