Question

giúp vs ạ

Answer 1

a, - \(\dfrac{8}{12}\) = \(\dfrac{-8:4}{12:4}\) = \(\dfrac{-2}{3}\);     \(\dfrac{16}{100}\) = \(\dfrac{16:4}{100:4}\) = \(\dfrac{4}{25}\)

b, So sánh: \(\dfrac{2}{3}\) và \(\dfrac{3}{4}\) 

    \(\dfrac{2}{3}\) = 1 - \(\dfrac{1}{3}\); \(\dfrac{3}{4}\) = 1 - \(\dfrac{1}{4}\) vì \(\dfrac{1}{3}\) > \(\dfrac{1}{4}\)

nên \(\dfrac{2}{3}\) < \(\dfrac{3}{4}\)