Bài 1:
a) \(\dfrac{15}{18}\times\dfrac{6}{5}=1\)
b) \(\dfrac{3}{16}\times\dfrac{8}{12}=\dfrac{1}{8}\)
c) \(\dfrac{4}{15}\times\dfrac{22}{8}\times\dfrac{10}{33}=\dfrac{2}{9}\)
d) \(\dfrac{3}{4}\times\dfrac{12}{19}\times\dfrac{4}{3}\times\dfrac{19}{24}=\dfrac{1}{2}\)