so gom 6 tram , 5 van va 6 chuc duoc viet la .................................

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so gom 15 trieu 3 van 9 nghin 7 tram 5 don vi viet la

8 van , 13 tram , 92 chuc ,5don vi viet

Viet so co 3 chu so co hang chuc gap 2 lan hang don vi ,hang tram gap 3 lan hang chuc . Co may so

tim so co ba chu so biet chu so hang chuc chia cho chu so hang don vi duoc 2 du 2, chu so o hang tram chia cho chu so hang don vi duoc 2 du 1

cho mot so co 3 chu so:

chu so hang don vi hon chu so hang chuc la 2 don vi.

chu so hang chuc kem chu so hang tram la 1 don vi

hoi neu doi chu so hang don vi va hang tram cho nhau thi so da cho tang hay giam bao nhieu don vi

hay viet so tu nhien gom 9 trieu 5 chuc nghin 1 chuc don vi Viet so lien truoc va so lien sau cua so do

So gom 6 trieu 5 tram 4 chuc duoc viet la ?

tim so tu nhien co 2 chu so ,biet rang neu viet them chu so 0 xen giua chu so hang chuc va hang don vi cua so do ta duoc so moi gap 10 lan so can tim .Neu viet them chu so 1 vao ben trai so vua nhan duoc thi so do gap len 3 lan.