Question

-的相反數(shù)是________，倒數(shù)是________，絕對(duì)值是________．

Answer 1

    -    
分析：只有符號(hào)不同的兩個(gè)數(shù)互為相反數(shù)．一個(gè)正數(shù)的絕對(duì)值是它本身；一個(gè)負(fù)數(shù)的絕對(duì)值是它的相反數(shù)；0的絕對(duì)值是0．倒數(shù)的定義：若兩個(gè)數(shù)的乘積是1，我們就稱這兩個(gè)數(shù)互為倒數(shù)．利用這些知識(shí)即可求解．
解答：-的相反數(shù)是-（-）=，倒數(shù)是=-，絕對(duì)值是|-|=．
故本題的答案是；-；．
點(diǎn)評(píng)：此題考查了相反數(shù)、絕對(duì)值和倒數(shù)的性質(zhì)，要求學(xué)生牢固掌握相反數(shù)、絕對(duì)值和倒數(shù)的性質(zhì)及其定義，并能熟練運(yùn)用．