Question

用简便方法计算：999*778+333*666

Answer 1

原式=999*778+333*(3*222)=999*(778+222)=999*1000=999000

Answer 2

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

Answer 3

999*778+333*666
=9*111*2*389+3*6*111*111
=9*2*111*(389+111)
=9*2*111*500
=999000

Answer 4

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

Answer 5

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