Question

若a是有理數(shù)，根據(jù)條件填空：

(1)若a＞0，則|a|＝________，－a是________數(shù)，a的倒數(shù)是________數(shù)．

(2)若a＝0，則|a|＝________，它的相反數(shù)是________．

(3)若a＜0，則|a|＝________，－a是________數(shù)，a的倒數(shù)是________數(shù)．

Answer 1

答案：a,負,正;0,0;－a,正,負