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a) \(\dfrac{1}{2}\)=\(\dfrac{6}{12}\) b) \(\dfrac{-7}{8}\)=\(\dfrac{-28}{32}\) c)\(\dfrac{3}{4}\)=\(\dfrac{15}{20}\) d) \(\dfrac{-4}{9}\)=\(\dfrac{-16}{36}\)
e) \(\dfrac{3}{4}\)=\(\dfrac{15}{20}\)
HỌC TỐT
a) \(\dfrac{3}{4}=\dfrac{15}{20}\)
b) \(\dfrac{4}{5}=\dfrac{12}{15}\)
c) \(\dfrac{-4}{9}=\dfrac{-16}{36}\)
d) \(\dfrac{7}{-13}=\dfrac{21}{-39}\)
a ) \(\dfrac{3}{4}\)= \(\dfrac{15}{20}\)
b )\(\dfrac{4}{5}\)= \(\dfrac{12}{15}\)
c) \(\dfrac{-4}{9}\)=\(\dfrac{-16}{36}\)
d) \(\dfrac{7}{-13}\)=\(\dfrac{21}{-39}\)
a)\(4\dfrac{2}{5}:2=\dfrac{22}{5}.\dfrac{1}{2}=\dfrac{11}{5}=2\dfrac{1}{5}\)
b)\(4\dfrac{2}{5}:2=\left(4+\dfrac{2}{5}\right):2=2+\dfrac{1}{5}=2\dfrac{1}{5}\)
\(\dfrac{-2}{-2}=\dfrac{3}{3}=\dfrac{-5}{-5}=\dfrac{7}{7}=\dfrac{-9}{-9}\)=1