问题 解答题
直接写出得数.
7
16
=
4
5
×
3
4
=
20
7
=
1
2
+
1
2
=
7
9
×
2
21
=
7
8
-
3
4
=
2
9
×
6
5
=
5
8
×6=
1
3
-
1
4
=
1
2
×
1
3
×
1
5
=
答案

7
16
=
7
4
4
5
×
3
4
=
3
5
20
7
=0
1
2
+
1
2
=1
7
9
×
2
21
=
2
27
7
8
-
3
4
=
1
8
2
9
×
6
5
=
4
15
5
8
×6=
15
4
1
3
-
1
4
=
1
12
1
2
×
1
3
×
1
5
=
1
30

单项选择题
单项选择题