12*48+12*1+12*4+12*47
12*(48+1+4+47)
12*100=1200
12 x 48 + 12 + 48 + 12 x 47
= 12 x 48 + 12 x 1 + 12 x 4 + 12 x 47
= 12 x (48 + 1 + 4 + 47)
= 12 x 100 = 1200
12 * 48 + 12 + 48 + 12 * 47
= 12 *( 48 + 47 ) + ( 12 + 48 )
= 12 * 95 + 60
= 1140 + 60
= 1200
12.48+12+48+12.47
=12.48+12.1+12.4+12.47
=12.(48+1+4+47)
=12.100
=1200
chu y :
dau cham la dau nhan
nho tick cho minh nhe
1200
tickticktickticktickticktick
tick nha bạn