问题 解答题
直接写出结果
1
3
-
1
4
=
0.5+
1
5
=
1
6
-
1
7
=
3
10
+
1
4
=
3
10
-
3
20
=
2
3
-
1
4
=
3
4
+
5
6
=
7-
5
7
=
0.5+
2
3
=
7
8
-
3
8
=
答案

1
3
-
1
4
=
1
12
0.5+
1
5
=0.7,
1
6
-
1
7
=
1
42
3
10
+
1
4
=0.55,
3
10
-
3
20
=
3
20
2
3
-
1
4
=
5
12
3
4
+
5
6
=
19
12
7-
5
7
=6
2
7
0.5+
2
3
=
7
6
7
8
-
3
8
=
1
2

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