100以内3的倍数有几个 哪几个

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100以内3的倍数有几个 哪几个

100以内3的倍数有几个 哪几个
100以内3的倍数有几个 哪几个

100以内3的倍数有几个 哪几个
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

3到99的等差数列公差为3

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

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