问题 解答题
直接写得数
2
9
=
2
3
×
1
6
=
3
5
×
1
6
=
1
3
+
1
4
=
2
7
×21=
2-
2
7
=
4
9
÷
2
3
=
1
10
÷
1
5
=
答案

2
9
=13.5,
2
3
×
1
6
=
1
9
3
5
×
1
6
=
1
10
1
3
+
1
4
=
7
12
2
7
×21=6,
2-
2
7
=1
5
7
4
9
÷
2
3
=
2
3
1
10
÷
1
5
=
1
2

单项选择题 A1/A2型题
单项选择题 共用题干题