题目内容
在“横线”里填上“>”、“<”或“=”.
.
| 6 |
| 12 |
>
>
| 1 |
| 6 |
| 1 |
| 9 |
<
<
| 9 |
| 72 |
| 12 |
| 12 |
=
=
| 15 |
| 15 |
| 2 |
| 3 |
=
=
| 12 |
| 18 |
| 12 |
| 36 |
<
<
| 7 |
| 9 |
| 9 |
| 45 |
<
<
| 4 |
| 5 |
分析:①把
化成分母为12的分数,然后比较;
②把
化成分母为72的分数,然后比较;
③约分后都是1,据此解答;
④把
化成分母为18的分数,然后比较;
⑤把
化成分母为36的分数,然后比较;
⑥把
化成分母为45的分数,然后比较.
| 1 |
| 6 |
②把
| 1 |
| 9 |
③约分后都是1,据此解答;
④把
| 2 |
| 3 |
⑤把
| 7 |
| 9 |
⑥把
| 4 |
| 5 |
解答:解:①
=
,因为
>
,故
>
;
②
=
,因为
<
,故
<
;
③
=1,
=1,故
=
;
④
=
,故
=
;
⑤
=
,因为
<
,故
<
;
⑥因为
=
,因为
<
,因此
<
.
故答案为:>,<,=,=,<,<.
| 1 |
| 6 |
| 2 |
| 12 |
| 6 |
| 12 |
| 2 |
| 12 |
| 6 |
| 12 |
| 1 |
| 6 |
②
| 1 |
| 9 |
| 8 |
| 72 |
| 8 |
| 72 |
| 9 |
| 72 |
| 1 |
| 9 |
| 9 |
| 72 |
③
| 12 |
| 12 |
| 15 |
| 15 |
| 12 |
| 12 |
| 15 |
| 15 |
④
| 2 |
| 3 |
| 12 |
| 18 |
| 2 |
| 3 |
| 12 |
| 18 |
⑤
| 7 |
| 9 |
| 28 |
| 36 |
| 12 |
| 36 |
| 28 |
| 36 |
| 12 |
| 36 |
| 7 |
| 9 |
⑥因为
| 9 |
| 45 |
| 1 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
| 9 |
| 45 |
| 4 |
| 5 |
故答案为:>,<,=,=,<,<.
点评:此题主要是通过通分,化成同分母分数,再进行比较.
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