將下列各數(shù)填在相應(yīng)的集合里.
-3.8,-10,4.3,-|-
20
7
|,42,π,3,101001000…,0,-(-
3
5

整數(shù)集合:{                                …};
分?jǐn)?shù)集合:{                                …};
正數(shù)集合:{                                …};
負(fù)數(shù)集合; {                                …};
有理數(shù)集合:{                                …}.
分析:先對于第四、五、十個式子化簡,利用各自的定義判斷,即可得到正確結(jié)果.
解答:解:-|-
20
7
|=
20
7
,42=16,-(-
3
5
)=
3
5

則整數(shù)集合:{-10,42,3,0…};
分?jǐn)?shù)集合:{4.3,-|-
20
7
|,-(-
3
5
)…};
正數(shù)集合:{4.3,42,π,3,101001000…,-(-
3
5
)…};
負(fù)數(shù)集合:{-3.8,-10,-|-
20
7
|,…},
有理數(shù)集合:{-3.8,-10,4.3,-|-
20
7
|,42,3,0,-(-
3
5
)}.
故答案是::-10,42,3,0;4.3,-|-
20
7
|,-(-
3
5
);4.3,42,π,3,101001000…,-(-
3
5
);-3.8,-10,-|-
20
7
|;-3.8,-10,4.3,-|-
20
7
|,42,3,0,-(-
3
5
).
點評:考查了有理數(shù),認(rèn)真掌握有理數(shù)的分類;注意整數(shù)、0、正數(shù)之間的區(qū)別:0是整數(shù)但不是正數(shù).
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