tìm ước chung lớn nhất của:

a   56 va 140

b  24;84 va 180

c   60 va 180

d 15 va 19

bai 1; tim ucln roi tim cac uoc chung cua 09 va 126

bai2; tim cac uc cua 108 va 180 ma lon hon 15

viet tap hop cac so tu nhien le lon hon 3 va nho hon 10

minh can gap lam!!!!!!!!!!!

tim cac so tu nhien a,b biet a nhan b bang 180 va uoc chung lon nhat cua a,b bang 3

viet tap hop A cac so tu nhien le lon 3 va nho hon 10 bang 2 cach

minh can gap lam!!!!!!!!!!!!

Bai 1

3 nguoi cung lam mot cong viec,neu lam rieng nguoi thu nhat mat 4 gio,nguoi thu hai mat 5 gio, nguoi thu ba mat 6 gio.Hoi neu lam chung mat bao nhieu gio?

Bai2

tinh tong cac phan so lon hon -1/14 va nho hon -1/15 va co tu la -4.

Bai3:Tinh tong

-24/72 + -20/48

5/4 + -1/2 + -7/8

3+-7/9+5/6

-6/7+-4/5+(-4)

15/-60+-42/56

tu ba so doi 1 khac nhau va khac 0 ta lap dc tat ca cac so co 3 Chu so doi 1 khac nhau . Biet rang tong cac so lap dc la 2886 , hieu giua so lon nhat va so be nhat trong cac so lap dc la 495 . Cac chu so do la : .....;......;........(viet cac chu so theo gia tri tang dan )

GIUP MIH NHA MIH GAP LAM

tim cac uoc chung  va  cac uoc chung lon nhat cua cua 60,80

cho hai phan so C=2/n-1 va D=n+4/n+1 .tap hop cac so nguyen "n" de C va D deu la cac so nguyen la?

.mk dang can gap ai nhanh nhat mk tick cho