a, Viet phan so lon nhat co tong cua tu so va mau so bang 10
b, Viet phan so nho nhat co tong cua tu so va mau so la 2000
c, Cho 2 so tu nhien ab va 7ab biet trung binh cong cua chung la 428 tim moi so
1. Tim trung binh cong cua tat ca cac so tu nhien co 4 chu so khac nhau duoc viet boi bon chu so 0;3;5;7.Trung binh cong cua tat ca cac so do la?
2 .Tong cua 3 so bang 5,2. So thu nhat bang 2/3 so thu ba va so thu hai bang 50% so thu ba. Tim so thu hai?
3. Tim mot phan so co mau so bang 25 , biet rang neu cong tu so voi 34 va nhan mau so voi 3 thi duoc phan so moi bang phan so da cho. Tim phan so do?
4. Tim mot phan so biet rang neu cong them 4 vao tu so va giu nguyen mau so thi ta duoc phan so moi bang 1, con neu giu nguyen tu so va cong them 3 thi ta duoc phan so moi bang 1/2 .Tim phan so do?
5. Hay cho biet co tat ca bao nhieu so co 3 chu so ma tong co chu so cua moi so bang 4 . co tat ca bao nhieu so thoa man?
tim mot phan so co tong cua tu so va mau so la 44,biet neu lay tu so cong voi 6 va giu nguyen mau so thi duoc phan so moi bang 1.
hai so tu nhien co tong bang 2011 va giua chung co tat ca 9 so chan tim hai so do
hai so tu nhien co tong bang 2009 va giua chung co tat ca 5 so le
tim hai so tu nhien co tong cua chung bang 636 va giua chung co tat ca 11 so tu nhien khac
tim hai phan so biet tong cua bang 5/6 va hieu cua chung bang 1/6
tim hai phan so biet tong cua chung bang 17/20 va hieu cua chung bang 7/20
Tim mot phan so biet tong cua tu so va mau so la 126 va biet neu chuyen tu mau so len tu so 13 don vi thi ta duoc phan so moi co gia tri bang 1 .
viet phan so lon nhat co tong cua tu so va mau so bang 10
viet phan so nho nhat co tong cua tu so va mau so bang 2000
viet phan so lon nhat co tong cua tu so va mau so bang 100
viet phan so nho nhat co tong cua tu so va mau so bang 2000
Tong cua bon so tu nhien la so lon nhat co bay chu so. Neu xoa di chu so hang don vi cua so thu nhat thi duoc so thu hai. So thu ba bang hieu cua so thu nhat va so thu hai. So thu nhat la tich cua so be nhat co ba chu so va so lon nhat co bon chu so. Tim so thu tu.
tim mot phan so biet tong cua tu so va mau so cua phan so do bang 198 va biet phan so do co gia tri la 4/5