题目内容

把下面九个分数填在横线里,使得每组三个数的和相等:
1
2
,
1
3
,
1
4
,
1
6
,
1
12
,
2
3
,
3
4
,
5
12
,
7
12

______+______+______=______+______+______=______+______+______.
1
2
=
6
12
,
1
3
=
4
12
,
1
4
=
3
12
,
1
6
=
2
12
,
2
3
=
8
12
,
3
4
=
9
12
,
通分后的分数为:
6
12
,
4
12
,
3
12
,
2
12
,
1
12
,
8
12
,
9
12
,
5
12
,
7
12
,
6
12
+
7
12
+
2
12
=
8
12
+
4
12
+
3
12
=
1
12
+
9
12
+
5
12
,即
1
2
+
7
12
+
1
6
=
2
3
+
1
3
+
1
4
=
1
12
+
3
4
+
5
12
.
故答案为:
1
2
,
7
12
,
1
6
,
2
3
,
1
3
,
1
4
,
1
12
,
3
4
,
5
12
.
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