问题 解答题
直接写出得数.
4
5
-
2
5
=
8
9
-
5
9
=
7
10
-
1
2
=
11
20
+
1
4
=
2
3
-
1
6
=
1
4
+
1
5
=
5
6
+
1
3
=
3
8
+
3
8
=
答案

4
5
-
2
5
=
2
5
8
9
-
5
9
=
1
3
7
10
-
1
2
=
1
5
11
20
+
1
4
=
4
5
2
3
-
1
6
=
1
2
1
4
+
1
5
=
9
20
5
6
+
1
3
=
7
6
3
8
+
3
8
=
3
4

多项选择题
单项选择题