450 = 2 . 32 . 52
1500 = 22 . 3 . 53
ƯCLN ( 450 và 1500) = 2 . 3 . 52 = 150
ƯC ( 450 và 1500) = Ư (150) = {1; 150; 2; 75; 3; 50; 5; 30; 6; 25; 15; 10}
sua lai: U ( 150) = {75;50;30;25;15;10}
tim 2 so tu nhien a va b biet tich cua chung =210 biet rang voi 2 so tu nhien ab, ta co a.b= uoc chung lon nhat
TIM TAT CA CAC SO CO HAI CHU SO LA UOC CHUNG CUA A VA B , BIET RANG UOC CHUNG LON NHAT [A,B]=80
hai so tu nhien a va b co uoc chung lon nhat bang 6 so uoc chung cua 2 so tu nhien a va b la
1 :nguoi ta viet lien nhauday so tu nhien bat dau la 1: 1 ,2, 3, 4 ,5 , hoi chu so chu 659 la chu so nao ?
2 : tim so co 3 chu so , biet rang chu so hang tram gap 4 lan chu so hang don vi va neu viet so ay theo thu tu nguoc lai thi no giam di 594 don vi.
3 ; tim 2 so biet rang tong cua chung gap 5 lan hieu cua chung , tich cua chung gap 24 lan hieu cua chung
4 : tim hai so biet rang tong cua chung gap 7 lan hieu cua chung con tich cua chung gap 192 lan hieu cua chung.
giai theo phuong phap lop 6 nhe
tim 2 so tu nhien biet tong cua chung bang 84 va uoc chung lon nhat cua chung la 12
tim so tu nhien a va b \(\left(a>b\right)\) co tong bang 224,biet rang uoc chung lon nhat cua no la 28
tim 2 so tu nhien a va b biet a>b va tich cua chung la 1944, uoc chung lon nhat cua chung bang 18
tim 2 so tu nhien biet chung co tong bang 432 va uoc chung lon nhat cua chung bang 36
tim hai so tu nhien biet tong cua chung bang 84 va uoc chung lon nhat cua chung bang 6