( 2014 + 2 ) : 2 = 1008
đúng 100%
duyệt lẹ
trung binh cong cua day so la
[2014+2]/2=1008
vi tbc bang so dau +so cuoi chia cho 2
trung binh cong cac do trong day do 2,4,6,8...2012,2014
tim trung binh cong cua cac so hang trong day so sau
3,7,11.......95,99,103
Tinh trung binh cong cua cac so trong day so 2; 4; 6; 8; ...; 2012; 2014
tìm trung binh cong cua tat ca cac so hang trong day so sau
3,7,11,..............95,99,103
so trung binh cong cua cac so trong day so 1 , 4 , 7 , 10 , ... ,...22 , 25b
a = 10 b =117 , c 13 d 69
Trung binh cong cua n so la 80,biet mot trong cac so do la 100.Neu bo so 100 thi trung binh cong cac so con lai la 78. Tim n ?
trung binh cong cua N la 80 biet 1 trong nhung so do la 100 . neu bo so 100 thi thi trung binh cong cua cac so con lai la 78 . tim N
tim so trung binh cong cac so 4;6'8'10;12;14;16;18. em cocach nao tinh nhanh so trung binh cong cua cac so tren khong
trung binh cong cua n so la 80 biet mot so trong do la 100. neu bot di 100 thi trung binh cong cua cac so con lai la 78. tim n
