Theo đề bài ta có:
a + b = 11 * ( a - b )
--> a + b = 11 * a - 11 * b
--> b + 11 * b = 11 * a - a
--> 12 * b = 10 * a
--> 12 / 10 = a / b
--> a / b = 6 / 5
cho hai so A va B .biet tong (A+B) gap hieu (A-B) la 11 lan .tim ti so cua A va B(giai ra nhe)
cho 2 so A va B biet tong (A+b) gap hieu (A-B) la 11 lan Tim ti so cua voi B
cho 2 so a va b biet tong la a+b gap hieu la a-b la 11 lan tim ti so cua a voi b
cho 2 phan so 6/7 va 2/9 hay tim p/s a/b sao cho khi them ab/ vao 2 p/s da cho thi ty so cua 2 p/s la 3
cho 2 phan so 6/7 va 1/9 hay tim p/s a/b sao cho khi them a/b vao 1/9 va bot a/b o 6/7 thi ta duoc 2 p/s co ty so la 3
viet duoc bao nhieu p/s ma tong cua tu so va mau so 2012 co bao nhieu p/s nho hon 1 bang 1 lon hon 1
tim hai so chan co tong la 2100 biet giua chung co 18 so chan khac tim 2 so tu nhien biet tong cua hai so nay la 2019 giua chung co tat ca 20 so tu nhien khac
ai nhanh minh tick 5 lan giai han bai giai ra nha
cho 3 chu so a,b,c khac 0 ;a>b>c
a,lap duoc bao nhieu so co 3 chu so ?[trong cac so tren ko so nao duoc lap lai 2 lan]
b,biet tong cua tat ca cac so vua lap 3330.hieu cua so lon nhat va so be nhat trong cac so do la 594 tim 3 chu so a,b,c
1.cac so le lien tiep tu 211den 971 co bao nhieu chu so?
2.tong cua 100 so chan dau tien la bao nhieu?
3.tim a va b biet a+b=11 va b,a -a,b=2.7
Tim 2 so biet 5/8 tong cua 2 so do lon hon hieu cua chung la 16 don vi. Nua tong cua chung nhieu gap 8 lan nua hieu cua chung.
cho 2 so co tong bang 702 biet neu them vao so be 11 don vi va so lon 15 don vi thi duoc 2 so moi co ti so la 2,25 tim so lon
tim hieu cua hai so biet so lon gap 4 lan so be va biet khi cong hai so do voi tong cua chung thi bang 480 hieu cua hai so do la bao nhieu
