帶有正號的數(shù)叫正數(shù)(正號“+”,也可以省略不寫).正數(shù)包括正整數(shù)(自然數(shù))和正分數(shù)(有限小數(shù)和無限循環(huán)小數(shù)). (本文共 55 字 ) [閱讀本文] >>
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 帶有正號的數(shù)叫正數(shù)(正號“+”,也可以省略不寫).正數(shù)包括正整數(shù)(自然數(shù))和正分數(shù)(有限小數(shù)和無限循環(huán)小數(shù)). (本文共 55 字 ) [閱讀本文] >>