9+9+9+9=36
bn hiền tích mik đi
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9+9+9+9=36
bn hiền tích mik đi
viet 2 phep tinh cong ma tong cua no co 2 so hang la so tron chuc giong nhau
viet tat ca cac so co hai chu so ma tong cac chu so cua so do bang 15?
viet phep cong co cac so hang bang nhau va tong bang nhau
viet tat ca cac so co sau chu so ma tong bang 2
Tong cua hai so la so co hai chu so giong nhau ma chu so hang chuc la 7,so hang thu nhat la 9.Vay so hang thu hai la
tim so be nhat co hai chu sokhac nhau va co tong cac chu so bang 13
co bao nhieu so co 3 chu so khac nhau ma tong cac chu so hang tram va hang chuc bang 5
so be nhat co ba chu so khac nhau ma tong ba chu so cua so do bang 8 la