28 x (100+25)=28 x 100+28x25=2800+700=3500
28 x ( 100 + 25 ) = 28 x 100 + 28 x 25 = 2800 + 700 = 3500
28 x 125 = ( 20 + 8 ) x 125 = 20 x 125 + 8 x 125
= 2500 + 1000
= 3500
k mik nha!
\(28\times125=28\times\left(100+25\right)=28\times100+28\times25=2800+700=3500\)
28 x 125 = 28 x ( 100 + 25 )
= 28 x 100 + 28 x 25
= 2800 + 700
= 3500