tim so co 3 chu so biet chu so hang tram nho hon chu so hang chuc,chu so hang chuc nho hon chu so hang don vi va tong cac chu so do bang 6

tim tat ca cac so tu nhien có 2 chu so biet rang chu so hang don vi nho hon chu so hang chuc la 2 va tich cua chu so do cua no luon lon hon tong cua hai chu so cua nó la 34 don vi

viet tap hop cua cac so tu nhien co 2 chu so trong do

a chu so hang chuc nho hon chu so hang don vi la 5

b chu so hang chuc gap bon lan chu so hang don vi

c chu so hang chuc nho hon chu so hang don vi tong hai so do bang 14

ai giup mk thi se kb nha

co bao nhieu so tu nhien co 2 chu so trong do chu so hang chuc nho hon chu so hang don vi va tong cua 2 chu so do bang 14.

Viet tap hop cac so tu nhien co hai chu so,trong do:

a) Chu so hang chuc nho hon chu so hang don vi la 5

b) Chu so hang chuc gap 4 lan chu so hang don vi

c) Chu so hang chuc nho hon chu so hang don vi, tong hai chu so bang 14

tim so co 3 chu so biet chu so hang tram nho hon chu so hang chuc neu doi 2 chu so nay cho nhau  ta duoc so moi hon so cu 720don vi biet tong cua chu so hang don vi la 7

viet tap hop cac so tu nhien co hai chu so,trong do:

a,chu so hang don vi lon hon chu so hang chuc 4 don vi

b,chu so hang don vi gap 3 lan chu so hang chuc

c,chu so hang don vi nho hon chu so hang chuc va tong hai chu so =17

tim so co 4 chu so biet rang neu xoa di chu so hang chuc va hang don vi cua so do ta duoc so moi nho hon so da cho 3663 don vi

khi doi cho chu so hang chuc va chu so hang don vi cua 1 so cho nhau thi ta duoc 1 so moi nho hon so ban dau 26 don vi.tim so ban dau biet rang trung binh cong cac chu so cua no bang 7 va so do co 3 chu so