999×778+333×666
=999×778+333×(3×222)
=999×778+333×3×222
=999×778+999×222
=999×(778+222)
=999×1000
=999000
14*44+12*28+14*32
=14*(44+24+32)
=14*100
=1400
999×778+333×666
=999×778+333×(3×222)
=999×778+333×3×222
=999×778+999×222
=999×(778+222)
=999×1000
=999000
14*44+12*28+14*32
=14*(44+24+32)
=14*100
=1400