100以内3的倍数有几个 哪几个
问题描述：
100以内3的倍数有几个 哪几个
答
3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99
(99-3)/3+1=33个
答
3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99,共33个
答
100以内3的倍数有99÷3=33个 :
3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99
答
3到99的等差数列公差为3