\(=28.300+72.300\)
\(=300.\left(28+72\right)\)
\(=300.100=30000\)
\(28\cdot\left(231+69\right)+72\cdot\left(60+240\right)\)
\(=28\cdot300+72\cdot300\)
\(=300\cdot\left(28+72\right)\)
\(=300\cdot100=30000\)
28.(231+69)+72.(60+240)
=28.300+72.300
=300.(28+72)
=300.100
=30000
28.(231 + 69 ) + 72.( 60 + 240 ) = 28.300 + 72.300
= ( 28 + 72 ).300
= 100.300 = 30000
#hok tốt
28 . ( 231 + 69 ) + 72 . ( 60 + 240 )
= 28 . 300 + 72 . 300
= 300 . ( 28 + 72 )
= 300 . 100
= 30 000
=))
28.(231+69)+72.(60+240)
=28.300+72.300
=(28+72).300
=100.300
=30000
=28.300+72.300
=(28+72).300
=100.300
=30000
