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

整數(shù)集合:{                   …};
分?jǐn)?shù)集合:{                   …};
正數(shù)集合:{                   …};
負(fù)數(shù)集合:{                   …}.
分析:可按照有理數(shù)的分類填寫:
有理數(shù)
整數(shù)
分?jǐn)?shù)

有理數(shù)
正有理數(shù)
0
負(fù)有理數(shù)

(本題說的正數(shù)和負(fù)數(shù)都是有理數(shù)范圍內(nèi)的).
解答:解:
整數(shù)集合:{-10,42,0…}
分?jǐn)?shù)集合:{-3.8,4.3,-|-
20
7
|,-(-
3
5
)…}
正數(shù)集合:{4.3,42,-(-
3
5
)…}
負(fù)數(shù)集合:{-3.8,-10,-|-
20
7
|…}.
點(diǎn)評:本題考查有理數(shù)的分類以及對整數(shù),分?jǐn)?shù),正數(shù)以及負(fù)數(shù)概念的理解情況.
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