1.Tính tổng: \(\frac{5}{1.3}+\frac{5}{3.5}+\frac{5}{5.7}+....+\frac{5}{99.101}\)
2.Rút gọn phân số:
a)\(\frac{2929-101}{2.1919+404}\) b)\(\frac{6.9-2.17}{63.3-119}\)
c)\(\frac{3.13-13.18}{15.40-80}\) d)\(\frac{\left(-5\right)^3.40.4^3}{135.\left(-2\right)^{14}.\left(-100\right)^0}\)
e)\(\frac{-1997.1996+1}{-1995.\left(-1997\right)+1996}\) f)\(\frac{2.3+4.6+14.21}{3.5+6.10+21.35}\)
f)\(\frac{2.3+4.6+14.21}{3.5+6.10+21.35}\) g)\(\frac{3.7.13.37.39-10101}{505050-70707}\)
h)\(\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\)