问题 解答题
直接写出得数
2
9
+
7
9
=
1-
2
3
=
2
3
-
1
6
=
1
5
-
1
6
=
1-
3
5
-
2
5
=
91
28
=
答案

2
9
+
7
9
=1,
1-
2
3
=
1
3
2
3
-
1
6
=
1
2
1
5
-
1
6
=
1
30
1-
3
5
-
2
5
=0,
91
28
=
13
4

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