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

A)Viet 5 phan so bé Hon 1,co Mau so la 7 va co tu so lon hon 0:

B)Viet 5 phan so lon hon 1 va co mau so la 5:

C)Viet 5 phan so bang phan so tam phan muoi hai :

D)Viet cac phan so khac 0 co tong cua tu so va mau so bang 7:

E)Hai phan so lon hon 1 co mau so bang 7 la :

G)Hai phan so bang 1 la:

H)Khoanh vao cac phan so bang ba muoi sau phan nam tu: Hai phan ba; sau phan muoi nam;tam phan muoi hai;muoi phan muoi nam 

Giai ho minh bai toan nay nhe !Minh dang can bai toan nay trong ngay hom nay.

1.viet so tu nhien nho nhat co tong cac chu so bang 38?

2.mot phep chia hai so tu nhien co thuong la 6 va so du la 33.tim so bi chia,so chia,biet rang tong cua so bi chia,so chia,thuong va so du bang 695.

3.trung binh cong cua 3 so le lien tiep bang 299.tim so lon nhat trong 3 so do?

4.cho phan so a/b.rut gon so phan so a/b ta duoc phan so 5/7.neu them 71 don vi vao tu so va giu nguyen mau so,ta duoc phan so co gia tri bang 18/11.tim phan so a/b?

5.tim y biet:a=(2/11*13+2/13*5+2/15*17+2/17*19+2/19*21)*462-y=19

 cac ban giai chi tiet gium minh nhe,ban nao giai duoc minh cho ***** lun