trung binh cong cua 2 so la 234 biet so thu nhat la 196 tim so thu 2 giup mik vs

cho 3 so tu nhien  biet trung binh cong cua so thu nhat va so thu 2 la 258 , trung binh cong cua so thu 2 va so thu 3 la 336 ,trung binh cong cua so thu 1 va so thu 3 la 279 .tim so thu 3

cho ba so biet trung binh cong cua so thu nhat va so thu hai bang 239 trung binh cong cua so thu 2 va so thu 3 la 248 trung binh cong cua so thu ba va so thu nhat la 295.tim so thu ba

cho 3 so biet trung binh cong cua so thu nhat va so thu hai la 1945 trung binh cong cua so thu hai va so thu ba la 1954 trung binh cong cua so thu nhat va so thu ba la 1975.tim so thu hai

TRUNG BINH CONG CUA 2 SO LA 123 . SO THU NHAT LA SO BE NHAT CO BA CHU SO . TIM SO THU HAI

TRUNG BINH CONG CUA HAI CHU SO LA 135 . TIM HAI SO DO, BIET RANG SO THU NHAT GAP 4 LAN SO THU HAI

GIUP MIK NHA , MOI NGUOI

cho ba so biet trung binh cong cua so thu nhat va so thu hai la 1495 trung binh cong cua so thu hai va so thu ba la 1945,trung binh cong cua so thu nhat va so thu ba la 1975.Tim so thu hai(giai theo cach lap luan)

trung binh cong 3 so la 98.9.tim so thu nhat biet rang so thu nhat bang trung binh cong cua 2 so con lai

trung binh cong cua 3 so la so be nhat co 3 chu so khac nhau . biet so thu hai bang trung binh cong cua 2 so con lai . so thu 3 hojn so thu nhat la 14 . tim 3 so do.

trung binh cong cua 3 phan so la 31/90 . neu tang so thu 2 lan thi trung binh cong 3 so la 23/45 . biet so thu 2 hon so thu 3 la 2/15 tim so thu nhat