题目内容
1 |
2 |
1 |
3 |
1 |
4 |
1 |
6 |
1 |
8 |
1 |
12 |
考点:分数的加法和减法
专题:运算顺序及法则
分析:根据题意,把这几个分数通分,化成同分母的分数,然后再进一步解答.
解答:
解:
=
;
=
;
=
;
=
;
=
;
=
;
+
+
=
=1;所以,
+
+
=1;
+
+
+
=
=1;所以,
+
+
+
=1.
1 |
2 |
12 |
24 |
1 |
3 |
8 |
24 |
1 |
4 |
6 |
24 |
1 |
6 |
4 |
24 |
1 |
8 |
3 |
24 |
1 |
12 |
2 |
24 |
12 |
24 |
8 |
24 |
4 |
24 |
24 |
24 |
1 |
2 |
1 |
3 |
1 |
6 |
12 |
24 |
6 |
24 |
4 |
24 |
2 |
24 |
24 |
24 |
1 |
2 |
1 |
4 |
1 |
6 |
1 |
12 |
点评:本题关键是先通分,然后再进一步解答.
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