a) 56 | 2 140 | 2
28 | 2 70 | 2
14 | 2 35 | 5
7 | 7 7 | 7
1 1
56 = 23 . 7 140 = 22 . 5 . 7
=> UCLN( 56;140 ) = 22 . 7 = 28
Tương tự b
a ) Ta có 56 = 23 . 7; 140 = 22 . 5 . 7. Do đó ƯCLN (56, 140) = 22 . 7 = 28;
b ) Vì 180 ⋮ 60 nên ƯCLN (60, 180) = 60
a) ta co 56 =23 . 7;140= 22 5. 7.do do ucln(56,140)=22 . 7 =28 b)ta co 24 = 23 . 3;84 = 22 3 . 7;80 = 22 . 32 . 5 vay ucln (24,84,180) = 22 . 3 =12 xin loi bn nha minh khong viet co dau va so nho duoc
a,
Ta có:
56= \(2^3.7\)
140= \(2^2.5.7\)
ƯCLN( 56; 140) = 2^2. 7= 28
b,
Ta có:
60 = 2^2.3.5
180= \(2^2.3^2.5\)
ƯCLN( 60;180)= 2^2 . 3. 5=60
a) 56 = 7. 23
140 = 7 . 5 . 22
ƯCLN{56,140} = 7 . 22 = 14
b) 60 = 3 . 5 . 22
180 = 32 . 5 . 22
ƯCLN{60,180} = 3 . 5 . 22 = 60