vao luc nao thi dong ho go 13 tieng
Viet ten 15 hoat dong =Tieng anh
mua xuan tieng trong thi thung
nguoi ua vay kin dinh dong
tranh nhau danh dam doi mam lon
tien chi ho la de cho ong
4 nguoi 1co thua 1co
3 nguoi 1co 4nguoi ko
mn vo web nao de coppy anh dong the
3 nguoi o tro. 1 thang moi nguoi 10 dong. va den ki dong tien tro. 3 nguoi cung gop lai moi nguoi 10 dong. tong cong la 30 dong. chu nha tro bot cho ho 5 dong chi lay 25 dong va tra 5 dong qua nguoi giup viec de dua lai cho 3 vi khach tro. nguoi giup viec moi lay bot 2 dong con 3 dong tra lai cho 3 nguoi tro kia. nhu the moi nguoi o tro thang nay chi mat 9 dong. vay tai sao khi ta thuc hien phep tinh nhu the nay lai thieu di 1 dong. 9x3+2 ko bang 25+5?
voi 1 can 5l na 1 can 3l lam the nao de dong duoc 2l nuoc
anh a bo mot dong xu 1 dong vao may ban nuoc ngot tu dong va nhan nut nhung chang thay non nao roi ra . mot luc sau,anh b den chiec may do va cung bo mot dong xu mot dong vao , mot lon nuoc ngot lai roi ra ngay tuc khac. may ban hang tu dong hoan toan khong truc trac gi, tai sao no chi [[ ban ]] cho moi minh anh b
voi 1 can 5l va 1 can 2l lam the nao de dong duoc 3l nuoc
nha chi co 1 can 5l va 1 can 3l. lam the nao dong chinh xac duoc: 2l nuoc; 1l nuoc