在1至 2000这些整数里,是3的倍数但不是5的倍数的数有( )
A. 666个
B. 133个
C. 799个
D. 533个
人气:257 ℃ 时间:2019-09-09 17:21:33
解答
3的倍数有:2000÷3≈666(个),
是3的倍数又是5的倍数的有:2000÷15≈133(个),
时3的倍数但不是5的倍数的数有:666-133=533(个);
故选:D.
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