Tim BCNN cua
a} 60 va 280
b}84 va 108
c}13 va 15
Tim BCNN cua
A)60 va 280 b) 84 va 108 c) 13 va 15
Tim BCNN cua :
a) 84 va 108 b) 13 va 15 c) 10 ,12,15 d) 8,9,11 e) 24,40 ,168
a) 84 va 108
Ta có 84 = 22 . 3 . 7; 108 = 22 . 33.
BCNN (84, 108) = 22 . 33 . 7 = 756.
b) 13 va 15
BCNN (13, 15) = 195.
c) 10 ,12,15
10 = 2 . 5, 12 = 22 . 3, 15 = 3 . 5. BCNN (10, 12, 15) = 22 . 3 . 5 = 60;
d) 8,9,11
BCNN (8, 9, 11) = 8 . 9 . 11 = 792;
e) 24,40 ,168
Ta có 24 = 23 . 3, 40 = 23 . 5, 168 = 23 . 3 . 7.
BCNN (24, 40, 168) = 23 . 3 . 5 . 7 = 840.
Ủng hộ nhak ^_^ ^_^ ^_^
a) 84= 3.7.22
108 = 33.22
BCNN (84,108)= 22.33.7= 756
b) 13 = 13
15 = 3.5
BCNN (13,15) = 13 . 5. 3 = 195
CÒN LẠI BN TỰ LÀM NHOA GẦN THI RỒI
Hay tim ƯCNN va BCNN cua 36, 42 va 84?
36=22.32
42=2.3.7
84=22.3.7
ƯCNN(36,42,84)=2.3=6
BCLN(36,42,84)=22.32.7=252
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
ban trinh bay ra ho minh duoc khong thank ban
a) 60 va 280 b) 84 va 108 c) 13 va 15
Tim boi chung nho nhat cua cac so nay ?
TIM BCNN CUA 84 VA 108
84 = 2^2.3.7
108 = 2^2.3^3
=> BCNN(84;108) = 2^2 .3^3 .7 =756
84=22.3.7
108=22.33
BCNN(84,108)=22.33.7=4.27.7=756
Vậy BCNN của 84 và 108 là 756
Tim hai so a va b biet tong cua BCNN va UCLN cua chung la 15.
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
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.