viet tat ca cac so co hai chu so ma tong cac chu so cua so do bang 15?
1 câu trả lời
em phai tim so lon hon 5 ma la so co 1chu so la;6;7;8;9.Vay so 6 cong voi so lon nhat co 1 chu so la 9 , tuong tu voi 7 cong , v.v...,
viet tat ca cac so co hai chu so ma tong cac chu so cua so do bang 15?
em phai tim so lon hon 5 ma la so co 1chu so la;6;7;8;9.Vay so 6 cong voi so lon nhat co 1 chu so la 9 , tuong tu voi 7 cong , v.v...,
