Question

1111乘999的简便方法怎么算

要最简便的，急！（>o<）……

Answer 1

1111*999
=1111*(1000-1)
=1111*1000-1111*1
=1111000-1111
=1111000-1000-100-10-1
=111000-100-10-1
=110900-10-1
=110990-1
=1109889

Answer 2

1111*999
=1111*(1000-1)
=1111*1000-1111*1
=1111000-1111
=1109889

Answer 3

巧算助力简便计算让计算效率更高更准

Answer 4

=（1000+100+10+1）×999
=1000×999+100×999+10×999+1×999
=999000+99900+9990+999
=（999000+999）+（99900+9990）
=999999+109890
=1109889

Answer 5

1111*999
=1111*1000-1111
=1111000-1111
=1110889