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

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

Viet tap hop cac so tu nhien 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 2 chu so bang 14

ai giup mk mk se kb nha cam on nhiu

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

cho Fla tap hop cac so tu nhien co 2 chu so ma chu so hang chuc nho hon hang don vi la 5 . hoi tap hop Fco bao nhieu phan tu

cho E tap hop cac so tu nhien co hai chu so ma hu so hang chuc nho hon chu so hang don vi la 4 ,tim so tap hop g

- tim so chu so chan co 4 chu so 

- viet tat ca cac so tu 100 den 999phai dung bao nhieu chuvso 9

-co bao nhieu so le co 3 chu so

- viet 1000 sdo tu nyhien dau tien hoi chu so 3 cco mat bao nhieu lan

-viet tap hop cac so tu nhien co 2 chu so trong do a ) chu so hang chuc nho hon hang don vi la 4 b) chu so hang chuc gap 3 lan chu so hang don vi   c) chu so hang chuc nho hon chu so hang don vi ( tong 2 chu so = 12) 

cho B la tap hop cac so co 2 chu so, trong do chu so hang chuc nho hon chu so hang don vi la 5. tap hop B co so phan tu?

viet cac so tap hop cac so tu nhiên có 2 chữ số, trong đó

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

b)chữ số hàng chục gấp 4 lần chữ số hàng đơn vị.

c)chu so hang chuc nho hon chu so hang don vi ma tong cua chung bang 14