题目内容
在横线上“<”“>”或“=”.
+
-
+
-
.
| 3 |
| 4 |
| 1 |
| 4 |
=
=
1 | 1 |
| 2 |
>
>
| 1 |
| 9 |
| 5 |
| 7 |
>
>
| 3 |
| 7 |
| 1 |
| 6 |
>
>
1-| 7 |
| 8 |
| 1 |
| 3 |
>
>
| 1 |
| 8 |
| 7 |
| 15 |
| 3 |
| 15 |
>
>
| 1 |
| 15 |
| 4 |
| 11 |
| 5 |
| 11 |
>
>
| 7 |
| 11 |
| 3 |
| 4 |
| 2 |
| 4 |
>
>
| 1 |
| 6 |
分析:有两个分数加或减运算的,首先计算,都是分母相同的分数,分母不变,分子直接相加减;然后比较分数大小:②④⑤⑧分子相同,分母越小分数值越大;③⑥⑦分母相同,分子大的分数值大;即可得解.
解答:解:
+
=1
>
>
>1-
>
-
>
+
>
-
>
;
故答案为:=,>,>,>,>,>,>,>.
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 9 |
| 5 |
| 7 |
| 3 |
| 7 |
| 1 |
| 6 |
| 7 |
| 8 |
| 1 |
| 3 |
| 1 |
| 8 |
| 7 |
| 15 |
| 3 |
| 15 |
| 1 |
| 15 |
| 4 |
| 11 |
| 5 |
| 11 |
| 7 |
| 11 |
| 3 |
| 4 |
| 2 |
| 4 |
| 1 |
| 6 |
故答案为:=,>,>,>,>,>,>,>.
点评:此题主要利用分数的大小比较来解决问题.
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