Cau 1 co tat ca ..... so co 2 chu so ma hieu 2 chu so cua moi so do bang 6

Cau 2 so lon nhat co 2 chu so ma hieu 2 chu so cua moi so do bang 5 . La :.............

Cau 3 so be nhat co 2 chu so ma tong 2 chu so cua moi so do bang 9 . La : .............

so be nhat co hai chu so ma hieu hai chu so do bang 3. vay so do la bao nhieu 

so be nhat co hai chu so ma hieu cua hai chu so đo bang 4 la so  nao?

tim hai so co tong la so nho nhat co 4chu so sao cho khi chia so nay cho 1994 thi cho so du la so du lon nhat con hieu cua chung thi bang giua so lon nhat co bon chu so voi so lon nhất co hai chu so

hai so co tong bang so lon nhat co hai chu so so va hieu bang tich 2 chu so cua so lon nhat co hai chu so do hai so do la

tong cua hai so la so lon nhat co 3 chu so hieu hai so do la so le nho nhat co 3 chu so vay so lon la...............

so be nhat co hai chu so ma hieu cua so do bang 3 la

tong cua hai so lon nhat co 3 chu so hieu hai so do la so le nho nhat co 3 chu so tim so lon

tong cua hai so lon nhat co 3 chu so hieu hai so do la so le nho nhat co 3 chu so tim so lon