Cho phan so a/35
a, tim so nguyen to a de a/35 rut gon duoc
b, Tim cac so a biet phan so do la phan so toi gian nho nhat hon 1
tim phan so a/b bang phan so 18/27 biet rang ucln(a,b)=13
Ta da biet : trong he so ghi so thap phan ,cu muoi don vi o mot hang thi lam mot trong muoi gia tri :
So abcd trong he thap phan co gia tri bang :
a.10^3+b.10^2+c.10+d
Co mot he so cu hai don vi o mot hang thi lam thanh mot don vi o hang tren lien truoc do la he nhi phan moi chu trong he hai gia tri nhi phan chang han abcd ,mot trong hai gia tri 0va 1 mot so trong he thap phan chang han abcd duoc ki hieu abcd
tim phan so a/b bang phan so 18/27, biet rang ucln (a,b) 13
bang
Mot mot phan ba; mot mot phan tam; mot mot phan muoi lam; mot mot phan hai muoi tu; mot mot phan ba lam. Goi S la tich cua 100 so dau tien cua day khi do 51S bang bao nhieu. Cac bn giai chi tiet ra cho mink vs nhe
1)tim phan so bang phan so \(\frac{32}{60}\)biet tu va mau bang 115
2)tim phan so \(\frac{a}{b}\)=\(\frac{60}{108}\)biet UCLN(a,b)
tim phan so \(\frac{a}{b}\) co gia tri bang phan so \(\frac{60}{108}\) biet
a, UCLN(a,b)=30
b,BCNN(a,b)=180
giai nhanh ho mk nha
Tim phan so toi gian a/b biet :
a) Cong tu voi 4, cong mau voi 10 thi gia tri phan so ko doi
b) Cong mau vao tu, cong mau vao mau cua phan so thi duoc phan so moi bang 2 lan phan so da cho.
Cho phan so 9/43 . tim a khi biet cong tu va mau voi a duoc phan so co gia tri 1/3
