\(\frac{1997\times1996-1}{1995\times1997+1996}\)
\(=\frac{1997\times\left(1995+1\right)-1}{1995\times1997+1996}\)
\(=\frac{1997\times1995+1997-1}{1995\times1997+1996}\)
\(=\frac{1997\times1995+1996}{1995\times1997+1996}=1\)
tính hợp lý
\(\frac{41.61+34.41}{3+7+11+...+79}\)
\(\frac{1997.1996-1}{1995.1997+1996}\)
\(\frac{254.399-145}{254+399.253}\)
Bài 1 : Tính
a, \(\frac{1995}{1996}\). \(\frac{19961996}{19311931}\).\(\frac{193119311931}{199519951995}\)= ?
b,\(\frac{1313}{2121}\).\(\frac{165165}{143143}\).\(\frac{424242}{151515}\)=?
c,\(\frac{1997.1996-1}{1995.1997+1996}\)= ?
d,\(\frac{1997.1996-1}{1995.1997+1996}\)=?
Mk cần gấp lắm giải giúp mk nha ♣♣♣
Rút gọn ps -1997.1996+1/1995.1997+1996
A=\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
Rút gọn A
Rút gọn
\(\frac{-1997.1996+1}{-1995.\left(-1997\right)+1996}\)
Rút gon \(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
\(\frac{-1997.1996+1}{ \left(-1995\right).\left(-1997\right)+1996}\)
Hãy rút gọn
rút gọn phân số:
\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
rút gon: -1997.1996 +1 / ( -1995) . (-1997) + 1996
