奇數(shù)和偶數(shù)若某數(shù)是2的倍數(shù),它就是偶數(shù)(雙數(shù)),可表示為2n;若非,它就是奇數(shù)(單數(shù)),可表示為2n+1(n為整數(shù)),即奇數(shù)(單數(shù))...簡(jiǎn)單說(shuō)：個(gè)位是0,2,4,6,8的整數(shù)是偶數(shù)。個(gè)位是1,3,5,7,9的整數(shù)是奇數(shù)。奇數(shù)+奇數(shù)=（偶數(shù)）偶數(shù)＋奇數(shù)＝（奇數(shù)）偶數(shù)—偶數(shù)=（偶數(shù)）偶數(shù)＊奇數(shù)＝（偶數(shù)）偶數(shù)*偶數(shù)=（偶數(shù)）奇數(shù)＊奇數(shù)＝（奇數(shù)）2，奇數(shù)與偶數(shù)的區(qū)別奇數(shù)與偶數(shù)的和是奇數(shù)，奇數(shù)與奇數(shù)的和是偶數(shù)，偶數(shù)與偶數(shù)的和是偶數(shù)奇數(shù)不能被2整除，偶數(shù)能被2整除。（就是說(shuō)除完沒(méi)有余小數(shù)。）奇數(shù)的尾數(shù)是單＜1；...