问题 解答题
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

______+______+______=______+______+______=______+______+______.
答案

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

单项选择题 A1/A2型题
判断题