so lon nhat co 2 chu so ma chu so hang chuc 

gap 3 lan chu so hang don vi la gi ?

1.chu so hang chuc lon hon chu so hang don vi va tong 2 so bang 15 ? 2. Chu so hang don vi gap 9 lan chu so hang chuc va tong cua chung bang 10 ? 3. Chu so hang don vi chia het cho chu so hang chuc ?

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 mot so co 3 chu so biet tong 3 chu so la 20 tong 3 chu so gap 4 lan hang tram hang chuc gap ruoi hang don vi

Tim 1 so co 3 chu so biet tong 3 chu so la 20,tong 3 chu so gap 4 lan chu so hang tram,chu so hang chuc gap ruoi chu so hang don vi .Tim so do.

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

tong cac chu so cua mot so co 2 chu so bang so tu nhien nho nhat co 2 chu so va chu so hang chuc gap 4 lan chu so hang don vi do la so nao ?

( ghi them loi giai )

tim so co 3 chu so biet tong 3 so la 21 tong ba chu so gap ba lan hang tram chu so hang chuc hon chu so hang don vi 4. So can tim la violympic

so tu nhien lon nhat co 2 chu so ma hang cuc gap 6 lan chu so hang don vi la