“自然數(shù)不包括從0開始的負(fù)數(shù)，小數(shù)(負(fù)小數(shù))正整數(shù)不包括0，小數(shù)(負(fù)小數(shù))”擴(kuò)展數(shù)據(jù):定義1:整數(shù)中，能被2整除的數(shù)稱為偶數(shù),3:偶數(shù)奇數(shù)相加為偶數(shù),奇數(shù)偶數(shù)(5運(yùn)算性質(zhì))的知識(shí)點(diǎn):性質(zhì)1:偶數(shù)-0/=偶數(shù)，奇數(shù)奇數(shù)=偶數(shù),-1奇數(shù)和偶數(shù)的概念整數(shù)可分為奇數(shù)和偶數(shù),定義:整數(shù)中，能被2整除的數(shù)叫做偶數(shù),定義二的倍數(shù):二叫做偶數(shù)。{0}-11、奇數(shù)與偶數(shù)的定義概念知識(shí)點(diǎn)奇數(shù)和偶數(shù)的概念整數(shù)可分為奇數(shù)和偶數(shù)。能被2整除的數(shù)叫做偶數(shù)，不能被2整除的數(shù)叫做奇數(shù)。偶數(shù)通常可以用2k(k為整數(shù))表示，奇數(shù)可以用2k1...