\(48.\left(28-60\right)-28.\left(48-60\right)\)
\(=48.28-48.60-28.48+28.60\)
\(=-48.60+28.60\)
\(=60\left(28-48\right)\)
\(=60.\left(-20\right)\)
\(=-1200\)
48.(28-60)-28.(48-60)
=48.28-48.60-28.48+28.60
=(48.28-28.48)+(28.60-48.60)
=0+(28-48).60
=-20.60
=-1200
Bài làm
48 x ( 28 - 60 ) - 28 x ( 48 - 60 )
= ( 48 x 28 - 48 x 60 ) - ( 28 x 48 - 28 x 60 )
= ( 48 x 28 - 48 x 28 ) - ( 48 x 60 - 28 x 60 )
= 0 - 60 x ( 48 - 28 )
= 0 - 60 x 20
= 0 - 1200
= - 1200
48 x ( 28 - 60 ) - 28 x ( 48 - 60 )
= ( 48 x 28 - 48 x 60 ) - ( 28 x 48 - 28 x 60 )
= ( 48 x 28 - 48 x 28 ) - ( 48 x 60 - 28 x 60 )
= 0 - 60 x ( 48 - 28 )
= 0 - 60 x 20
= 0 - 1200
= - 1200