科目:初中數(shù)學(xué)
來(lái)源:
題型:解答題
填一填:
(1)給出下列各數(shù):.
①在這些數(shù)中,整數(shù)有______個(gè),負(fù)分?jǐn)?shù)有______個(gè),絕對(duì)值最小的數(shù)是______.
②3.75的相反數(shù)是______,絕對(duì)值是______,倒數(shù)是______.
③這些數(shù)用數(shù)軸上的點(diǎn)表示后,與原點(diǎn)距離最遠(yuǎn)的數(shù)是______.
(2)把下列各數(shù)填在相應(yīng)的大括號(hào)內(nèi):1,-0.1,-789,25,0,-20,-3.14,
整數(shù)集合{ …}
分?jǐn)?shù)集合{ …}
(3)①0的相反數(shù)是______; a的相反數(shù)是______;如果a與b互為相反數(shù),那么a+b=______.
②正數(shù)的絕對(duì)值是______;0的絕對(duì)值是______;負(fù)數(shù)的絕對(duì)值是它的______.
③絕對(duì)值小于2的整數(shù)有______;
④絕對(duì)值不大于3的負(fù)整數(shù)有______;
⑤數(shù)a和b的絕對(duì)值分別為2和5,且在數(shù)軸上表示a的點(diǎn)在表示b的點(diǎn)左側(cè),則b的值為_(kāi)_____.
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