12 x 9 + 12 x 1 + 12 x 100
= 12 x ( 9 + 1 + 100 )
= 12 x 110
= 1320
12 x 9 + 12 x 1 + 12 x 100
=108 + 12 + 1200
=1320
12 x 9 + 12 x 1 + 12 x 100
= 12 x ( 9+1+100 )
= 12 x 110
= 1320
12 x 9 + 12 x 1 + 12 x 100
= 12 x ( 9 + 1 + 100 )
= 12 x 110
= 1320
12x9+12x1+12x100
=12.(9+1+100)
=12.110
=1320
Vậy 12.9+12.1+12.100=1320