Ta có:\(a.b=UCLN\left(a,b\right).BCNN\left(a,b\right)=10.60=600\)
Bạn kẻ bảng nha
a |30| |10| |20| |60|
b |20| |60| |30| |10|
Ta có:\(a.b=UCLN\left(a,b\right).BCNN\left(a,b\right)=10.60=600\)
Bạn kẻ bảng nha
a |30| |10| |20| |60|
b |20| |60| |30| |10|
Tìm a va b biet UCLN(a,b)=10:BCNN(a,b)=900
1) Tìm a,b thuộc N , Biet UCLN (a,b) = 3 va a.b=891
2) UCLN(a,b) = 5 va bcnn(a,b) = 60
3) BCNN (a b) =180 va a-b = 6
biet rang BCNN(a,b).UCLN(a,b)=a.b
a, tong cua hai so bang 60,tong giua UCLN va BCNN cua chung la 84 tim hai so do
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.
tim a va b biet
A,a+b=128 va UCLN cua chung =16
B,UCLN cua a,b va BCNN cua chung =36
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]
tim (a,b) thuoc n*biet;b ,a/b=4/5 va BCNN=140 ;; a+b=128 va UCLN =16
tim hai so a va b biet a.b=2250va UCLN(a,b)=15
tin 2 so a va b biet rang a.b=1176;BCNN(a,b)=84 va a>b
Tim 2 so a va b biet UCLN(a,b)=12;BCNN(a,b)=72