问题 解答题
直接写得数.
3
8
+
3
8
=
1
2
+
1
3
=
5
6
-
2
3
=
1-
4
7
=
7
10
-
1
20
=
0.25+
3
4
=
5
12
+
1
6
=
2+
2
5
=
1
3
+
4
3
=
3
7
-
3
14
=
答案

3
8
+
3
8
=
3
4
1
2
+
1
3
=
5
6
5
6
-
2
3
=
1
6
1-
4
7
=
3
7
7
10
-
1
20
=
13
20
0.25+
3
4
=1,
5
12
+
1
6
=
7
12
2+
2
5
=2
2
5
1
3
+
4
3
=
5
3
3
7
-
3
14
=
3
14

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