666乘333加778乘999(简算)一定要简算
问题描述:
666乘333加778乘999(简算)
一定要简算
答
666*333+778*999
=3*222*333+778*999
=222*999+778*999
=(222+778)*999
=1000*999
=999000
答
=222×3×333+778×999
=222×999+778×999
=(222+778)×999
=1000×999
=999000