168=2^3.3.7

180= 2^2.5.3^2

UCLN= 2^2.3=12

a,

56=2³.7

140=2².5.7

=>ƯCLN(56,140)=2².7=28

60=2².3.5

180=2².3².5

=>ƯCLN(60,180)=2².3.5=60

b,

84=2².3.7

108=2².3³

=>BCNN(84,108)=2².3³.7=756

24=2³.3

40=2³.5

168=2³.3.7

=>BCNN(24,40,168)=2³.3.5.7=840

Tick giúp mình với nhá!

Tìm ƯCLN ( 180; 168 )

Ta có:

180 = 2² x 3² x 5

168 = 2³ x 3 x 7

=> ƯCLN ( 180; 168 ) = 2² x 3 = 4 x 3 = 12

Tìm BCNN ( 180; 168 )

Ta có:

180 = 2² x 3² x 5

168 = 2³ x 3 x 7

=> BCNN ( 180; 168 ) = 2³ x 3² x 5 x 7 = 8 x 9 x 5 x 7 = 2520

Ta có:

180 = 2².3².5

168 = 2³.3.7

=> ƯCLN(180;168) = 2².3 = 12

=> BCNN(180;168) = 2³.3².5.7 = 2520

Ta có : 180 = 2². 3². 5

168 = 2³. 3.7

=> UWCLN ( 180 , 168 ) = 2². 3 = 12

=> BCNN ( 180 , 168 ) = 2³. 3². 5 . 7 = 2520

UCLN(54,42,48)=6;UCLN(24,36,72)=12

UCLN(180,168)=12;UCLN(48,72)=24

xrminhmk...

a.6

b.12

c.12

d.24

bảo đảm đúng

là 12

nhớ k cho mình nha 

=12

HT BN HIỀN

Ta có:

\(540=2^2.3^3.5\)

\(168=2^3.3.7\)

Vậy: \(ƯCLN\left(540;168\right)=2^2.3=12\)

\(ƯC\left(540;168\right)=\left\{1;2;3;4;6;12\right\}\)

Cách 1: 60 = 22.3.5; 180 = 22.32.5

⇒ ƯCLN (60, 180) = 22.3.5 = 60.

72 = 2³.3²

104 = 2³.13

180 = 2².3².5

ƯCLN(72; 104; 180) = 2² = 4

72 = 2³ . 3²

104 = 2³ . 13

180 = 2² . 3² . 5

ƯCLN(72; 104; 180) = 2² . 3² = 36

72 = 2³.3² 

104 = 2³.13

180 = 2².3².5

ƯCLN (72; 104; 180) = 2² = 4 

Ta có 180 = 22.32.5 và 234 = 2.32.13 ⇒ ƯCLN(180, 234) = 2.32 = 18.

ƯC(180 ; 234) = Ư(18) = {1; 2; 3; 6; 9; 18}.

ƯCLN (24; 180) = 12. Mà Ư (12) = {1; 2; 3; 4; 6; 12}.

Vậy ƯC (24; 180) = {l; 2; 3; 4; 6}