问题 解答题
9
10
-
7
10
=
1
4
-
1
5
=
1
4
+
1
10
=
3
5
+
2
5
=
1
9
+
1
3
=
2
3
-
1
6
=
5
8
-
3
5
=
1-
2
5
=
9
11
+
2
11
=
2-
8
13
=
1.52-0.9=1-
1
4
-
1
6
=
答案

9
10
-
7
10
=
1
5
1
4
-
1
5
=
1
20
1
4
+
1
10
=
7
20
3
5
+
2
5
=1
1
9
+
1
3
=
4
9
2
3
-
1
6
=
1
2
5
8
-
3
5
=
1
40
1-
2
5
=
3
5
9
11
+
2
11
=1
2-
8
13
=1
5
13
1.52-0.9=0.621-
1
4
-
1
6
=
7
12

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