Sau khi rút gọn, phân số \(\dfrac{9.11+32.9}{23.15+12.23}\) bằng
\(\dfrac{43}{69}\). \(\dfrac{23}{9}\). \(\dfrac{43}{3}\). \(\dfrac{43}{23}\). Hướng dẫn giải:\(\dfrac{9.11+32.9}{23.15+12.23}\)\(=\dfrac{9.\left(11+32\right)}{23.\left(15+12\right)}\)\(=\dfrac{9.43}{23.27}\)\(=\dfrac{43}{23.3}=\dfrac{43}{69}\)
