tim so chia cua mot phep chia , biet rang : so bi chia 410, so du bang 19

a) tim mot so co hai chu so va neu lay so do chia cho chu so hang don vi thi duoc thuong la 8 va du 7

b) tong cua hai so bang 196 . tim hai so do

c)tim so co 3 chu so , biet rang neu viet them mot chu so 3 vao ben phai so do thi no tang them 2217 don vi 

khi chia mot so co hai chu so cho tong cac chu so cua no, ta duoc thuong bang 3 va du 5. tim so do?

1)  hieu cua tong cac so tu nhien le cohai chu so va tong cac so tu nhien chan co 2 chu so bang....  

2) cho biet 418 abcd gach ngan tren dau : abc =1481 khi do abc=...  

3)  khi lan giai mot bai toan dang le phai chia mot so cho 2va cong thuong tim duoc voi 3 nhung do nham lan lan da nhan so do voi 2 va sau do lay tich tru di 3 mac du vay ket qua van dung so can chia cho 2 la ......

tim mot so co 2 chu so biet lay so do chia cho tong cac chu so cua no thi duoc 8 du3

cho so co 2 chu so neu lay tong cac chu so cong voi tich cac chu so cua so da cho thi bang chinh so do tim chu so hang don vi cua so da cho

tim-mot-so-co-hai-chu-so-biet-tong-cac-chu-so-cua-so-do-bang-12-neu-do-cho-hai-chu-so-cua-so-do-cho-nhau-thi-duoc-mot-so-kem-so-ban-dau-54

Tim mot so co ba chu so biet, so do duoc viet boi 3 chu so 3,7,9 va khi xoa chu so ba cua so do ta duoc so moi , dem so cong voi so phai tim , ta duoc tong bang 818 .

Mot so co hai chu so bang 3 lan tong cac chu so cua no cong voi 7.Neu viet so do theo thu tu nguoc lai thi duoc so moi bang 7 lan tong cac chu so cua no cong voi 3.Tim so da cho

Tim mot so tu nhien co hai chu so, biet rang neu lay so do chia cho mot tong cac chu o cua no ta duoc thuong la 7