trong so thap phan 28,34 gia tri cua chu so 8 gap gia tri chu so 4 bao nhieu lan
trong so thap phan 285,34 gia tri chu so8 gap gia tri chu so 4 bao nhieu lan ? Giai thich vi sao?
tim hai so co 2 chu so biet rang tong cua hai so do la 98 neu gep so lon vao ben trai va ben phai cua so be deu duoc cac so co 4 chu so ma hieu cua chung bang 1386 tim hai so do
tim mot so co 2 chu so tu nhien biet neu them vao ben trai chu so 3 thi ta duocso moi gap 6 lan so phai tim
tong cua mot so co 3 chu so va 1 so co 2 chu so la mot chu so co 4 chu so. biet hai so hang va tong khong thay doi gia tri khi ta doc so do tu trai qua phai hoac tu phai qua trai. tim so co 3 chu so tren !
Cho mot so co hai chu so neu viet them chu so 1vao ben trai va ben phai ta duoc so moi gap 23 lan so can tim.
1. mot cua hang nhap vao moi hop banh la 70000 dong.hoi cua hang do phai ban ra voi gia bao nhieu de duoc lai 20% gia ban moi hop banh.
2.cho hai so tu nhien co trung binh cong cua hai so tu nhien bang 1485 va biet neu viet them chu so 1 vao ben trai so be ta duoc so lon.tim so be ?
3.trung binh cong cua tat ca cac so tu nhien co 3 chu so.
tim 1 so co 2 chu so biet rang neu viet them vao ben trai ben phai so do 1 chu so 5 ta duoc 1 so moi co 4 chu so gap 75 lan so phai tim
Cho một sô co hai chu so .Neu ta viet them chu so 1 vào ben phai va ben trai cua so do thi ta đuợc so moi gap 21 lan so da cho. Tim so da cho