題文
把數(shù)-7,4.8,4,0,-9,-7.9,-12,-312,23分別填在相應的大括號內(nèi).
正數(shù):{______…}
負數(shù):{______…}
分數(shù):{______…}
整數(shù):{______…}.
題型:未知 難度:其他題型
答案
正數(shù):{4.8,4,23,…};
負數(shù):{-7,-9,-7.9,-12,-312,…};
分數(shù):{4.8,-7.9,-312,…};
整數(shù):{-7,4,0,-9,-12,23,…}.
故答案為:4.8,4,23;-7,-9,-7.9,-12,-312;4.8,-7.9,-312;-7,4,0,-9,-12,23.
解析
12
考點
據(jù)培訓啦專家說,試題“把數(shù)-7,4.8,4,0,-9,-7.9.....”主要考查你對 [有理數(shù)定義及分類 ]考點的理解。
有理數(shù)定義及分類
有理數(shù)的定義:
有理數(shù)是整數(shù)和分數(shù)的統(tǒng)稱,一切有理數(shù)都可以化成分數(shù)的形式。
有理數(shù)的分類:
(1)按有理數(shù)的定義:
??????????????????????????????正整數(shù)?
???????????????? 整數(shù){???? 零?
???????????????????????????? ?負整數(shù)
有理數(shù){?????
???????????????????????? ?? 正分數(shù)?
????????????????分數(shù){
??????????????????????????? 負分數(shù)
?
(2)按有理數(shù)的性質(zhì)分類:?
???????????????????????????正整數(shù)??
?????????????? 正數(shù){?
???????????????????????????正分數(shù)
有理數(shù){? 零
???????????????????????????負整數(shù)?
???????????????負數(shù){
????????????????????????? ?負分數(shù)