题目内容

直接写出得数:
①
2
9
+
3
9
=
②
8
12
-
5
12
=
③1-
5
6
=
④
1
2
+
1
3
=
⑤
7
8
-
2
8
=
⑥4+
6
7
=
⑦
3
8
-
1
4
=
⑧
4
5
+
1
5
=
⑨
9
10
-
1
2
=
⑩
2
3
+
1
4
=
①
2
9
+
3
9
=
5
9
②
8
12
-
5
12
=
1
4
③1-
5
6
=
1
6
④
1
2
+
1
3
=
5
6
⑤
7
8
-
2
8
=
5
8
⑥4+
6
7
=4
6
7
⑦
3
8
-
1
4
=
1
8
⑧
4
5
+
1
5
=1
⑨
9
10
-
1
2
=
2
5
⑩
2
3
+
1
4
=
11
12
故填:
5
9
,
1
4
,
1
6
,
5
6
,
5
8
,4
6
7
,
1
8
,1,
2
5
,
11
12
.
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