co bao nhieu so co hai chu so ma hieu hai chu so bang 4
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?
co bao nhieu so co hai chu so ma hieu hai chu so bang 4 (hay cho loi giai chi tiet)
co bao nhieu so co hai chu so ma hieu bang 4
so be nhat co hai chu so ma hieu hai chu so do bang 3. vay so do la bao nhieu
co bao nhieu so co 2 chu soma hieu hai chu so cua no bang so le nho nhat co mot chu so
Co bao nhieu so co 2 chu so khac nhau ma hieu cac chu so bang 3 ?
co tat ca bao nhieu so co 2 chu so ma hieu cua 2 chu so 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