Question

rut gon phan so sau

\(\frac{3.13-13.18}{15.40-80}\)

Answer 1

\(\frac{3.13-13.18}{15.40-80}=\frac{13.\left(3-18\right)}{15.40-40.2}\)

\(=\frac{13.\left(-15\right)}{40.\left(15-2\right)}=\frac{13.\left(-15\right)}{40.13}\)

\(=\frac{-15}{13}\)

Answer 2

\(\frac{3.13-13.18}{15.40-80}\) \(=\frac{13.\left(3-18\right)}{40.\left(15-2\right)}=\frac{13.\left(-15\right)}{40.13}\) \(=\) \(\frac{-8}{3}\)

Answer 3

Trả lời :

\(\frac{3.13-13.18}{15.40-80}\)\(=\)\(\frac{39-234}{600-80}\)

                                \(=\)\(\frac{-195}{520}\)

                              \(=\)\(\frac{-3}{8}\)