tim so co 3 chu so biet chu so hang tram nho hon chu so hang chuc,chu so hang chuc nho hon chu so hang don vi va tong cac chu so do bang 6

tong 3 so la 600 . tim so thu 3 , biet so thu 2 lon hon so thu 1 la 3 don vi nhung nho hon so thu 3 la 3 don vi 

tim so co hai chu so biet tong cua hai chu so do la so lon hon 10.ti so cua chu so hang chuc va chu so hang don vi la 2/3

Tong cua 3 so la 1978. So thu nhat hon tong hai so kia la 58 don vi. Neu bot o so thu hai di 36 don vi thi so thu hai se bang so thu ba. Tim 3 so do.

tim mot so biet so do nho hon 800 va chu so hang tram nho hon chu so hang chuc , chu so hang chuc nho hon chu so hang don vi va tong cac so cua chu so cua so do bang 24

Tim so co hai chu so, biet chu so hang don vi hon chu so hang chuc la 3, tong cua so phai tim va so viet theo thu tu nguoc lai cua so do bang 143

Tong cua 3 so la 120.Tim 3 so do,biet so thu nhat it hon so thu 2 7 don vi,so thu 2 it hon so thu 3 7 don vi

cho 3 so co tong bang 618. Biet so thu 2 hon so thu nhat 54 don vi va kem so thu ba 33 don vi. Tim so thu nhat

Tim so co hai c/s biet tong hai c/s cua no la 13 .neu do I vi tri hai c/scuba so do cho nhau at duoc so moi hon so ban dau 9 don vi