Tim phan so a/b:
7/8-a/b=1-1/2
ghi them loi giai
Tim phan so a/b:
5/6-a/b=1/2+1/4
ghu them loi giai?
Ta có : \(\frac{5}{6}-\frac{a}{b}=\frac{1}{2}+\frac{1}{4}\)
=> \(\frac{5}{6}-\frac{a}{b}=\frac{3}{4}\)
=> \(\frac{a}{b}=\frac{5}{6}-\frac{3}{4}\)
=> \(\frac{a}{b}=\frac{1}{12}\)
5/6-a/b=1/2+1/4
5/6-a/b=3/4
a/b = 5/6-3/4
a/b = 1/12
=> a = 1; b = 12
5/6 - a/b = 1/2 + 1/4
5/6 - a/b = 3/4
a/b = 5/6 - 3/4
a/b = 1/12
Tich 2 phan so la 8/15 .Them 4 don vi vao phan so thu nhat thi tich moi la 56/15 . tim hai phan so
loi giai ho minh
Gọi hai phân số cần tìm là a và b
Theo bài ra,ta có: a.b = \(\frac{8}{15}\)
=> (a + 4).b = \(\frac{56}{15}\)
a.b + 4.b = \(\frac{56}{15}\)
\(\frac{8}{15}\)+ 4.b = \(\frac{56}{15}\)
4.b = \(\frac{56}{15}-\frac{8}{15}\)
4.b = \(\frac{16}{5}\)
b = \(\frac{16}{5}:4\)
b = \(\frac{4}{5}\)
Mà a.b = \(\frac{8}{15}\)
=> a.\(\frac{4}{5}\) = \(\frac{8}{15}\)
a = \(\frac{8}{15}:\frac{4}{5}\)
a = \(\frac{2}{3}\)
Vậy hai phân số cần tìm là \(\frac{2}{3};\frac{4}{5}\)
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
Tim phan so X/Y biet hieu cua X va Y bang 8 va X/Y sau khi rut gon chi bang 5/3?
Ghi them loi giai!!
Tử số là: 8:( 5 - 3 ) x 5 = 20. Mẫu số là: 20 - 8 = 12. Vậy phân số đó là:20/12
Cho phan so 35 phan 49 . Tim mot so tu nhien sao cho khai mau so tru so do va tu so giu nguyen thi duoc phan so moi bang 7 phan 8
Loi giai cu the
Ban co the giai cu the cho minh duoc khong
Cho bieu thuc B= 7/ n -7
a) So nguyen n phai co dieu kien gi de B la phan so.
b) Tim phan so B biet n = -7
c) Tim cac so nguyen n de B la so nguyen.
bn nao co loi giai chi tiet bai nay mk se tick,vi mk dung dien thoai ko viet dau dc nen cac ban thong cam nha.
cho phan so a/b co gia tri = 3/7 va neu them vao tu 60 don vi thi duoc 1 phan so moi co gia tri = 3/2 tim phan so a/b.
Cho phan so 7/8, hay tim so A sao cho dem tu so cua phan so da cho tru di A va them A vao mau so ta duoc phan so moi 1/4.
cho phan so 7/8.hay tim so tu nhien a sao cho dem tu so cua phan so da cho tru di a va them a vao mau so thi duoc phan so 1/4.
bang 4 do chac 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000phan tram luon