125+125+250+250+125+125
={ 125 + 125 + 125 + 125} + {250+250}
= 500 + 500
= 1000
..................................................................=1000
\(125+125+250+250+125+125\)
\(=\left\{125+125+125+125\right\}+\left\{250+250\right\}\)
\(=500+500\)
\(=1000\)
Học Tốt !
125 + 125 + 250 + 250 + 125 + 125
= ( 125 + 125 ) + 250 + 250 + ( 125 + 125 )
= 250 + 250 + 250 + 250
= 250 x 4
= 1000