用5、7、8、0拼成一個四位數(shù),使它是2的倍數(shù),這個數(shù)可以是________,使它是5的倍數(shù),這個數(shù)可以是________.
5780,5870,5708,5078,8570,8750,7580,7850,7058,7508 5780,5870,8570,8750,7580,7850,7805,7085,8705,8075
分析:根據(jù)2的倍數(shù)的特征:個位上是0、2、4、6、8的數(shù),進行組數(shù)即可;
5的倍數(shù)的特征:個位上是0或5的數(shù),進行組數(shù)即可.
解答:用5、7、8、0拼成一個四位數(shù),
是2的倍數(shù)有:5780,5870,5708,5078,8570,8750,7580,7850,7058,7508;
是5的倍數(shù)有:5780,5870,8570,8750,7580,7850,7805,7085,8705,8075;
故答案為:5780,5870,5708,5078,8570,8750,7580,7850,7058,7508;5780,5870,8570,8750,7580,7850,7805,7085,8705,8075.
點評:本題主要考查2、5的倍數(shù)特征,注意牢固掌握2、5的倍數(shù)特征,靈活運用.