tong 3 so la 307.5 biet 1/3 so A bang 40% so B bang 30% so C . Tim 3 so do
cho 3 so co tong bang 307.5.biet 1/3 so 1 bang 2/5 so 2 bang 1/2so 3.tim so 1
cho 3 so co tong bang 307.5 biet 1/3 so thu nhat bang 40% so thu hai bang 50% so thu ba tim so thu nhat.
2 so co tong la 405 biet 1/3 so thu1 bang 2/9 so thu 2 tim 2 so
tim mot phan so biet tong cua tu va mau so cua phan so do bang 135 va biet phan so do co gia tri bang 2/3
PHAN SO DO LA...........................
3 kho thoc co tong la 1012 ta . biet 1/2 so kho thoc A bang 3/7 so kho B va bang 5/9 kho C . hay tim so thoc cua moi kho ?
Tong cua 2 so do la 760.Tim 2so do,biet 1/3 so thu nhat bang 1/5 so thu hai .
tong hai so la 215 tim hai so do biet rang 2 lan so thu nhat bang 3 lan so thu hai
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?
