Question

Rút gọn phân số:

a) \(\dfrac{2929-101}{2.1149+404}\)

b) \(\dfrac{6.9-2.17}{63.3-119}\)

c) \(\dfrac{3.13-13.18}{15.40-80}\)

d) \(\dfrac{-1997-1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)

e) \(\dfrac{2.3+4.6+14.21}{3.5+6.10+21.35}\)

g) \(\dfrac{\left(-5\right)^3.40.4^3}{135.\left(-3\right)^{14}.\left(-100\right)^0}\) 

h) \(\dfrac{18.34+\left(-18\right).124}{-36.17+9.\left(52\right)}\)

j) \(\dfrac{9.11+32.9}{23.15+12.23}\)

k) \(\dfrac{12.13+24.26+36.39}{24.26+48.52+72.78}\)

Answer 1

b) \(\dfrac{6\cdot9-2\cdot17}{63\cdot3-119}\)

\(=\dfrac{2\left(3\cdot9-17\right)}{7\cdot\left(3\cdot9-17\right)}\)

\(=\dfrac{2}{7}\)