Question

giải nhanh hộ em với                                                                                                12/7 x 3/4 : 3/14                                                                                                       2+5/2 :18

Answer 1

a: \(\dfrac{12}{7}\cdot\dfrac{3}{4}:\dfrac{3}{14}=\dfrac{36}{28}\cdot\dfrac{14}{3}=\dfrac{9}{7}\cdot\dfrac{14}{3}=\dfrac{9}{3}\cdot\dfrac{14}{7}=3\cdot2=6\)

b: 2+5/2:18

=2+5/36

=72/36+5/36

=77/36

Answer 2

\(\dfrac{12}{7}\times\dfrac{3}{4}:\dfrac{3}{14}\)

\(=\dfrac{12}{7}\times\dfrac{3}{4}\times\dfrac{14}{3}\)

\(=\dfrac{12\times3\times14}{7\times4\times3}\)

\(=\dfrac{3\times4\times7\times2\times3}{3\times4\times7}\)

\(=2\times3\)

\(=6\)

\(2+\dfrac{5}{2}:18\)

\(=2+\dfrac{5}{2}\times\dfrac{1}{18}\)

\(=2+\dfrac{5}{36}\)

\(=\dfrac{72}{36}+\dfrac{5}{36}\)

\(=\dfrac{77}{36}\)

#Toru