\(90\cdot50+50\cdot9+50\)
\(=50\cdot\left(90+9+1\right)\)
\(=50\cdot100\)
\(=5000\)
90 . 50 + 50 . 9 + 50
= 4500 + 50 . 10
= 4500 + 500
= 5000
( Dấu . là dấu nhân nhé )
= 450 + 50 x 9 + 50 x 1
= 450 + 50 x ( 9 + 1 )
= 450 + 50 x 10
= 450+ 500
= 950
ta có : 90*50+50*9+50
= 50*(90+9+1)
=50*100
=500
90 . 50 + 50 . 9 + 50
= 50 . (90 + 9 + 1)
= 50 . 100
= 5000.
90 x 50 + 50 x 9 + 50
= 50 x ( 90 + 9 +1 )
=50 x 100
=5000
