Cho hai phân số a/b và a/c . tìm hệ thức giữa a,b,c dẻ tong cua hai phan so do bang tich cua chung
1.cho hai phan so co tong bang -3 va tich bang 12/5. tinh tong cac nghich daao cua hai phan so do
2.cho hai phan so toi gian a/b va c/d. biet a/b+c/d E z. chung minh /b/=/d/
Tim hai so nguyen biet:
a,Tich cua chung bang 4747 vaf tong cua chung bang-148
b,Tich cua chung bang -7373 va tong cua chung bang 28
c,Tich cua chung bang 1261 va hieu cua chung bang -84
tim hai phan so co tu bang 1, mau duong sao cho tong cua 2 phan so cong voi tich cua chung bang 1/2
hai so tu nhien co tong bang 2011 va giua chung co tat ca 9 so chan tim hai so do
hai so tu nhien co tong bang 2009 va giua chung co tat ca 5 so le
tim hai so tu nhien co tong cua chung bang 636 va giua chung co tat ca 11 so tu nhien khac
tim hai phan so biet tong cua bang 5/6 va hieu cua chung bang 1/6
tim hai phan so biet tong cua chung bang 17/20 va hieu cua chung bang 7/20
tim hai so,biet tong cua chung bang so lon nhat co hai chu so va hieu cua chung bang tich cua hai chu so do
Bạn ơi! "Hai chữ số đo ..." rồi làm sao nữa ??
tong bang 99 hieu bang 81 2so la 90 va 9
a,co hai so tu nhien nao co tong bang 2005 ma tich cua chung bang 5749 hay khong?
b, co hai so tu nhien nao co hieu bang 2002 ma tich cua chung bang 2006 hay khong?
Biet rang : BCNN(a,b).UCLN(a,b)
a, BCNN cua hai so la 600, UCLN cua chung nho hon 10 lan BCNN. So thu 1 la 120, tim so thu 2.
b, UCLN cua hai so la 12, BCNN cua chung lon gap 6 lan UCLN . So t 1 la 24, tim so t 2
c, Tong cua hai so bang 60, tong giua UCLN va BCNN cua chung la 84. Tim hai so do.
tim hai so biet tong cua chung bang so lon nhat co hai chu so va hieu cua chung bang tich hai chu so cua so do .
a)Neu tong cua 2 so tu nhien la 1 so le, thi tich cua chung co the la 1 so le va mot so chan duoc ko?
b) neu tich cua 2 so tu nhien la 1 so le,cthi tong cua chung co the la 1 so le va mot so chan duoc ko ?
c) Cho hai so tu nhien bat ki. Neu tong cua hai so do la so chan thi hieu cua chung la chan hay le?