问题 解答题
直接写出得数.
1
4
-
1
5
=
1
4
+
3
5
=
2
7
+
4
7
=
14
19
-
7
19
=
7
12
+
1
2
=
1
12
+
1
4
=
1
5
+
1
8
=
6
25
-
1
5
=
答案

1
4
-
1
5
=
1
20
1
4
+
3
5
=
17
20
2
7
+
4
7
=
6
7
14
19
-
7
19
=
7
19
7
12
+
1
2
=1
1
12
1
12
+
1
4
=
1
3
1
5
+
1
8
=
13
40
6
25
-
1
5
=
1
25

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