cho day so 1,2,3,4,5,...2010 .
a)Hỏi dãy số đó có bao nhiêu chữ so5
b)Hoi day so do co bao nhieu chu so 1
c)Hoi day so do co bao nhieu chu so 0
cho day so 1 , 2 ,3 ,4 , ... ,2006 . a) hoi day so tren co bao nhieu chu so . b) day so co tat ca bao nhieu chu so 5 . c) chu so thu 206 la chu so nao
B1: cho day so tu nhien: 1,2,3,4,5......100. Hoi day so do co bao nhieu chu so.
B2. Mot o to moi gio di duoc 45km. Hoi trung binh moi phut o to do di duoc bao nhieu m?
cho day so tu 1 den 2015 .hoi trong day co bao nhieu chu so 6
Cho day so tu nhien lien tiep tu 1 den 1995.Hoi trong day so do co :
a,co tat ca bao nhieu chu so 1 ?
giai day du nhe minh tick cho
cho day so 2,4,6,............................2016,2018
hoi day tren co bao nhieu so hang
tinh tong day tren
day tren co bao nhieu chu so
tim so hangh thu 202 cua day
cho day so tu nhien lien tiep 1,2,3,...,1999 a hoi day so co bao nhieu chu so b cho day so 2,12,30,56,90,... hay viet them 5 so tep theo cua day
Cho day so chan lien tiep : 2,4,6,8,10,....,2468.
a) Hoi day co bao nhieu chu so?
b) Tim chu so thu 2000 cua day?
biet rangkhi viet day so 1.2.3.4........ta phai dung 201 chu so hoi day so tren co bao nhieu so