a) \(\dfrac{12}{5}\)
b) \(\dfrac{1}{6}\)
c) \(\dfrac{6}{7}\)
d) \(\dfrac{8}{45}\)
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a) \(\dfrac{4}{5}+\dfrac{1}{3}=\dfrac{12}{15}+\dfrac{5}{15}=\dfrac{17}{15}\)
b) \(\dfrac{2}{3}:4=\dfrac{2}{3}:\dfrac{4}{1}=\dfrac{2}{3}x\dfrac{1}{4}=\dfrac{2}{12}=\dfrac{1}{6}\)
c) \(\dfrac{13}{7}-\dfrac{7}{7}=\dfrac{91}{49}-\dfrac{49}{49}=\dfrac{42}{49}=\dfrac{6}{7}\)
d) \(\dfrac{4}{9}x\dfrac{2}{5}=\dfrac{8}{45}\)
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