问题 解答题
直接写得数.
3
5
×20=
5
7
+
1
3
=
5
9
÷13=
2
9
×18=
3
4
-
1
8
=
3
4
÷8=
4
15
×
5
8
=
4
5
×
1
8
=
2
9
×4=
2
3
=
1
2
÷
1
4
=
1
7
×
2
3
=
答案

3
5
×20=12;
5
7
+
1
3
=
22
21
5
9
÷13=
5
117
2
9
×18=4;
3
4
-
1
8
=
5
8
3
4
÷8=
3
32
4
15
×
5
8
=
1
6
4
5
×
1
8
=
1
10
2
9
×4=
8
9
2
3
=9;
1
2
÷
1
4
=2;
1
7
×
2
3
=
2
21

单项选择题
单项选择题