Sao ko ai tra loi di minh dag can gap bai nay
Hang tram:(2+3+5)x6=60 Hang chuc:(2+3+5)x4=40 Hang don vi:(2+3+50x4=40 Tong= 60 tram+40 chuc+40 don vi=6440
Hang tram:(2+3+5)x6=60 ; hang chuc:(2+3+5)x4=40 ; hang don vi:(2+3+5)x4=40
Tong=60 tram+40 chuc+40 don vi =6440
so cac so lap duoc la: 3*3*2=18(so)
so lan xuat hien cac chu so o hang tram la: 18/3=6(lan)
solan xuat hien cac chu so o hang chuc va hang don vi la: (18-6)/3=4(lan)
tong cac so co 3 chu so khac nhau lap duoc tu cac so tren la:
6*(2+3+5)*100+4*(2+3+5)*10+4*(2+3+5)*1
6*10*100+4*10*10+4*10*1
6000+400+40=6440
d/s:6440
lam theo minh la dung , bai nay minh lam roi