=12.(5+5+990)
=12.1000
=12000
ai k mk mk k lại cho !
\(12.5+12.5+12.990\)
\(=12.\left(5+5+990\right)\)
\(=12.1000\)
\(=12000\)
<=> 12 x ( 5 + 5 + 990 )
= 12 x ( 10 + 990 )
= 12 x 1000
= 12 000
nha bn
Ta có: 12.5 + 12.5 + 12.990
= 12.(5+5+990)
=12.1000
=12000