HInh tren la phep cong ma cac so trong phep tinh do deu duoc ma hoa boi cac chu cai. Biet rang cac chu so giong nhau duoc ma hoa boi cung mot chu cai, nguoc lai, cac chu so khac nhau duoc ma hoa boi cac chu cai khac nhau. Hoi chu X la ma hoa ua chu so nao? Cần gấp lắm đấy!

X+X+YY=ZZZ

tong cua hai so chan  lien tiep la so chan lon nhat co 3 chu so .

Vay so chan be la :           

So chan  lon la :

cac ban giup minh duoc khong 

Khi cong mot so tu nhien co 4 chu so voi mot so tu nhien co 5 chu so,mot ban da dat tinh nham de cac chu so cua so co 4 chu so lech sang ben trai 1 hang va thang hang voi cac chu so cua so co 5 chu so.Vi vay ket qua thu duoc tang them 11106 don vi.Hoi:a.Tim ket qua dung cua phep cong biet so co 5 chu so la 12345.b.Tim so co 5 chu so do biet ket qua sai la 55550

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

1.gia tri cua chu so 2 trong 27934 la

2. mua 28 hop sua duoc sep vao 7 vi vay mua 9 vi nhu the thi co so hop la

3.hinh vuong co canh 7 cm chu vi hinh vuong la 

1 cua hang ban mut trong dip tet ban duoc 80% so mut voi so tien lai la 20%so voi tien vonhoi sau khi ban het so mut cua hang duoc lai bao nhieu phan tram so voi tien von?

tra loi nhanh minh tick cho nhung ma cac ban cho minh biet lam the nao de tick cho cac ban vay roi minh tick cho

Tinh cac so thap phan co 4 chu so khac nhau ma co 3 chu so o phan thap phan lap duoc la 0,3,5,7

So tu nhien co 3 chu so khac nhau tong cua cac chu so = 22 la so nao ?

Ai nhanh ma dung se duoc 2 tich vi minh dang can gap ^_^ !

Dung 2 que diem xep duoc cac so la ma nao nho hon 30