7
11
1   
1
7
8
7
8
   
7
4
=
=
1
3
4
11
8
19
15
1
7
15
 
9
8
8
9
分析:同分母分?jǐn)?shù)大小比較,分子大的分?jǐn)?shù)就大,反之就;同分子的分?jǐn)?shù)大小比較,分母大的分?jǐn)?shù)就小,反之就大;異分母分?jǐn)?shù)大小比較,先通分再比較大。
解答:解:
7
11
<1
1
7
8
7
8
7
4
=1
3
4
11
8
<2
19
15
<1
7
15
9
8
8
9
故答案為:<、>、=、<、<、>.
點(diǎn)評(píng):此題主要考查分?jǐn)?shù)大小的比較方法的靈活應(yīng)用.
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