Question

Quy đồng các phân số 
a)5/24 và -21/56        b)-3/16 và -21/51

Answer 1

\(a,\dfrac{5}{24}=\dfrac{5.7}{24.7}=\dfrac{35}{168};\dfrac{-21}{56}=\dfrac{-21.3}{56.3}=\dfrac{-63}{168}\\ b,\dfrac{-21}{51}=\dfrac{-21:3}{51:3}=\dfrac{-7}{17}=\dfrac{-7.16}{17.16}=\dfrac{-112}{272};\dfrac{-3}{16}=\dfrac{-3.17}{17.16}=\dfrac{-51}{272}\)

Answer 2

a) 5/24 = 35/168

-21/56 = -63/168

b) -3/16 = -48/272

-21/51 = -7/17 = -112/272