分别把下列个数分解素因数 18,32,45,51,75,84,把下列个数填入适当的圈内1,2,3,4,5,7,9,11,15,21,27,29,39,41,46,51,87.奇数( )偶数( )素数( )合数( )

问题描述:

分别把下列个数分解素因数 18,32,45,51,75,84,把下列个数填入适当的圈内1,2,3,4,5,7,9,11,15,21,27,29,39,41,46,51,87.奇数( )偶数( )素数( )合数( )

18=2*3*332=2*2*2*2*245=3*3*551=3*1775=3*5*584=2*2*3*71,2,3,4,5,7,9,11,15,21,27,29,39,41,46,51,87.奇数( 1,3,5,7,9,11,15,21,27,29,39,41,51,87)偶数(2,4,46)素数(2,3,5,7,11,13,29,41,)合数(4,9,15,21,...