a)\(\dfrac{19}{15}\)
b)\(\dfrac{1}{2}\)
c)\(\dfrac{7}{24}\)
\(\dfrac{9}{35}\)
a,\(\dfrac{19}{15}\)
b,\(\dfrac{1}{2}\)
c,\(\dfrac{7}{24}\)
d,\(\dfrac{9}{35}\)
\(\frac{7}{15}+\frac{4}{5}=\frac{11}{15}\)
\(\frac{4}{5}\times\frac{5}{8}=\frac{20}{40}\)
\(\frac{2}{3}-\frac{3}{8}=\frac{7}{24}\)
\(\frac{9}{7}\div5=\frac{9}{35}\)
a) \(\dfrac{7}{15}+\dfrac{4}{5}=\dfrac{7}{15}+\dfrac{12}{15}=\dfrac{19}{15}\)
b) \(\dfrac{4}{5}\times\dfrac{5}{8}=\dfrac{20}{40}=\dfrac{1}{2}\)
c) \(\dfrac{2}{3}-\dfrac{3}{8}=\dfrac{18}{24}-\dfrac{9}{24}=\dfrac{7}{14}\)
d) \(\dfrac{9}{7}\div5=\dfrac{9}{7}\times\dfrac{1}{5}=\dfrac{9}{35}\)