Question

Thực hiện phép tính
\(-\frac{5}{12}.\frac{2}{7}\)+\(\frac{7}{12}.\frac{-3}{4}\)

Answer 1

-5/12 . 2/7 + 7/12 . -3/4

= -10/84 + -21/48

= -5/42 + -7/16  

= -40/336 + -147/336

= -187/336

Answer 2

\(\frac{-5}{12}\).\(\frac{2}{7}\)+\(\frac{7}{12}\).\(\frac{-3}{4}\)

=\(\frac{5}{12}\).\(\frac{-2}{7}\)+\(\frac{7}{12}\).\(\frac{-3}{4}\)

=\(\frac{5}{12}\).(\(\frac{-2}{7}\)+\(\frac{-3}{4}\))

\(\frac{5}{12}\).\(\frac{-29}{28}\)

=\(\frac{-145}{336}\)

((nho k cho mink nhe)