cho a = 45 ; b = 204 ; c = 126
a, tim UCLN( a ; b ; c )
b, tim BCNN ( a ; b )
Cau 12 : Cho a=45 ; b=204; c= 126
a) Tim UCLN ( a,b,c)
b) Tim BCNN ( a,b,c)
GIUP MINH VOI !
cho a = 35 , b = 40 , c = 210
a ) tim UCLN ( a,b,c )
b ) tim BCNN ( a,b,c )
Biet rang : BCNN(a,b).UCLN(a,b)
a, BCNN cua hai so la 600, UCLN cua chung nho hon 10 lan BCNN. So thu 1 la 120, tim so thu 2.
b, UCLN cua hai so la 12, BCNN cua chung lon gap 6 lan UCLN . So t 1 la 24, tim so t 2
c, Tong cua hai so bang 60, tong giua UCLN va BCNN cua chung la 84. Tim hai so do.
cho a=123456789 ;b=987654321
a)tim UCLN(a,b)
b)tim so du trong phep chia BCNN(a,b) cho 11
bài 1 : a Tìm UCLN của (7n+10;5n+7)
b Tìm UCLN của (2n-1:9n+4)
bài 2: Tim n de : UCLN(7n +13;2n+4)=1
bai 3 :tim ab sao cho :
a BCNN (a;b)=240 va (a:b)=16
b a.b =180 va (a;b)=16
c a-b =12 va (a,b)=16
d 7a = 11b va (a;b)=45
4 Tìm abc sao cho abbc =ab *ac *7
Tim hai so tu nhien a va b biet:
a) 7a = 11b va (a,b)=45
b)BCNN(a,b)=300 va ab=4500
c)a+b=30 va BCNN = 6UCLN
d) a+2b=48 va UCLN(a,b) + 3. BCNN(a,b)=114
cho a/b=15/35,biet UCLN(a,b).BCNN(a,b)=3549
tim (a,b)
a, ab = 360 va BCNN[ a;b] = 60
b, UCLN[a:;b] =12 va BCNN[a;b] = 72
c, UCLN[a;b] = 15 va BCNN[a;b]=2100.UCLN[a;b]