tong 2 so la 5,07 . tim 2 so do biet rang 5 lan so thu nhat cong voi 3 lan so thu 2 duoc 19,27
tong 2 so bng 10,45 tim 2 so do biet rang neu so hang thu nhat cong voi 4 lan so hang thu 2 thi duoc 22,45
Tim 2 so biet rang tong cua chung la 59.3 .neu so thu nhat gap len 2.4 lan so thu hai gap len 1.9 lan thi duoc tong moi la 124.72
tong cua hai so la 5,79 . tim hai so do , biet rang 9 lan so thu nhat cong 5 lan so thu hai duoc 33,87
tong cua 2 so bang 7,9 tim hai sso do biet rang 3 lan so hang thu nhat cong voi so hang thu hai thi duoc 13,3
tim 1 phep cong 2 phan so thap phan biet rang neu so hang thu nhat them 2.001 don vi tong la 223.221 con tang so hang thu hai len 2 lan thi tong la 241.32
tong 2 so la 7,36.tim hai so biet rang 3 lan so hang thi nhat tru so hang thu hai thi duoc 12,64
tong cua 2 so bang 43,75 tim 2 so do biet rang neu so thu 1 gap 5 lan va giu nguyen so thu 2 thi duoc tong moi bang 124,95
tong 2 so bang 7, 36 tim 2 so do biet rang 3 lan so hang thu nhat tru di so hang thu hai thi duoc 12,64
