Question

Answer 1

avata của bạn giống avata fac của mink rứa :))

 

Answer 2

thế nên sẽ giúp bạn

Answer 3

a) 1,4\(\times\dfrac{15}{49}\) -\(\dfrac{13}{15}\) : \(\dfrac{11}{5}\)

=\(\dfrac{3}{7}\) -\(\dfrac{13}{33}\)

=\(\dfrac{8}{231}\)

b)\(\dfrac{12}{7}\) \(\times\left(\dfrac{75}{8}-\dfrac{21}{4}\right)\)  

=\(\dfrac{12}{7}\) \(\times\dfrac{33}{8}\)

=\(\dfrac{99}{14}\)

c)\(\dfrac{4}{7}\)\(\times\left(\dfrac{-6}{13}+\dfrac{7}{13}-\dfrac{1}{13}\right)\) -\(\dfrac{43}{5}\)

=-\(\dfrac{43}{5}\)