a和b都是自然數(shù),且a-2=b.當a是奇數(shù)時,a和b的最大公約數(shù)是______,最小公倍數(shù)是______;當a是偶數(shù)時,a和b的最大公約數(shù)是______,最小公倍數(shù)是______.
(1)當a是奇數(shù)時,b是與a相鄰的奇數(shù),那么
a和b的最大公約數(shù)是 1,最小公倍數(shù)是 ab;
(2)當a是偶數(shù)時,b是與a相鄰的偶數(shù),
a和b的最大公約數(shù)是 2,最小公倍數(shù)是
ab.
故答案為:1,ab,2,
ab.