Question

999×778+333×666怎样简便算？

Answer 1

原式＝999×778+333×3×222
＝桐姿型999×778+999×222
＝册悄999×（局猜778+222）
＝999×1000
＝999000

Answer 2

999×778+333×666
= 999×778+333×3×222
=999×778+ 999×222
=999×（778+ 222）
=999 ×1000
=999000