1: 60=2^2*3*5
280=2^3*5*7
=>BCNN(60;280)=2^3*5*7*3=840
2: 84=2^2*3*7
108=2^2*3^3
=>BCNN(84;108)=2^2*3^3*7=756
3: 13=13
15=3*5
=>BCNN(13;15)=13*3*5=195
4: 10=2*5
12=2^2*3
15=3*5
=>BCNN(10;12;15)=2^2*3*5=60
5: 8=2^3; 9=3^2; 11=11
=>BCNN(8;9;11)=2^3*3^2*11=72*11=792
6: 24=2^3*3
40=2^3*5
168=2^3*3*7
=>BCNN(24;40;168)=2^3*3*5*7=840
7: 30=2*3*5
105=3*5*7
=>BCNN(30;105)=2*3*5*7=210
8: 40=2^3*5
28=2^2*7
140=2^2*5*7
=>BCNN(40;28;140)=2^3*5*7=240
10: 16=2^4
25=5^2
=>BCNN(16;25)=2^4*5^2=400
a, BCNN(60; 280) = 23.3.5.7 = 840.
b, BCNN(84; 108) = 22.33.7 = 756
c, BCNN(13; 15) = 3.5.13 = 195.
d, BCNN(10, 12, 15) = 22.3.5 = 60.
đ,BCNN(8; 9; 11) = 23.32.11 = 792.
g,BCNN(24, 40, 168) = 23.3.5.7 = 840.
Anh cho ra đáp số luôn nhé!
Theo thứ tự từ 1 -> 20
1. 840
2. 756
3. 195
4. 60
5. 792
6. 840
7. 210
8. 280
9. 200100
10. 400
11. 3528
12. 90
13. 171
14. 2520
15. 280
16. 204
17. 770
18. 693
19. 737035
20. 1559972700
