tim bcnn cua 12,27,35
tìm BCNN (24,25);BCNN(12,27,35)
BCNN(12,27,35)
12=2^2.3
27=3^3
35=5.7
=>BCNN(..)=2^2.3^3.5.7=3780
a ] bạn hãy tìm BCNN{24,15} , BCNN{ 12,27,35}
Ta có
24=23.3
15=3.5
=>BCNN(24,15)=23.3.5=120
===============
Ta có
12=22.3
27=33
35=5.7
=>BCNN(12,27,35)=22.33.5.7=3780
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 BCNN cua 34;68
tim BCNN cua (16;34;240)
Ta có :
16=2^4
34=2.17
240=2^4.3.5
=>BCNN(16;34;240)=2^4.17.3.5=4080
Vay BCNN(16;34;240)=4080
dung thi k nhe neu sai bao mik thi mik xem lai
OK tks
16 = 24
34 = 2 . 17
240 = 24. 3 . 5
BCNN ( 16;34;240 ) = 24, 3.5.17 = 4080
Đáp án chính là 4080
ta co:16=2^4
34=2.17
240=2^4.3.5
suy ra BCNN cua (16,34,240)=2^4.4.3.5.17=16 320
tim BCNN cua 576;672va996
Vì 576= 26. 32
672= 25. 3.7
996=22. 3 . 83
=> BCNN(576;672;996)= 26 . 32 .7 . 83 = 334656
nếu đúng thì nhớ like đấy
tim bcnn cua 24,40,168
Phân tích :
24 = 23 . 3
40 = 23 . 5
168 = 23 . 3. 7
=> BCNN(24;40;168) = 23 . 3 . 5 . 7 = 840
Tim BCNN cua 40,25va140