co bao nhieu so co 3 chu so khac nhau ma tong cac chu so hang tram va hang chuc bang 5
co tat ca bao nhieu so co hai chu so ma tong hai chu so cua moi so do bang 8?
co tat ca bao nhieu so co hai chu so ma hieu hai chu so cua moi so do bang 6?
hieu cua hai so la so lon nhat co 2 chu so ma tong 2 chu so cua no bang 12 so tru bang 7 vay so bi tru cua no la bao nhieu vay cac ban
co tat ca bao nhieu so co 2 chu so ma hieu cua 2 chu so bang 6
co bao nhieu so co hai chu so ma hieu hai chu so bang 4
co bao nhieu so co hai chu so ma hieu hai chu so bang 4
Co bao nhieu so co 3 chu so tron chuc ma hieu cua so hang tram va hang chuc bang 2?
co bao nhieu so co 2 chu s 0 ma tich hai chu so cua so do khac 0va bang thuong hai chu so cua so do
co bao nhieu so co hai chu so ma hieu bang 4