Question

tính:

18/7 -  13/4 =

Answer 1

\(\dfrac{18}{7}-\dfrac{13}{4}=\dfrac{72}{28}-\dfrac{91}{28}=\dfrac{-19}{28}\)

Answer 2

\(\dfrac{18}{7}-\dfrac{13}{4}=\dfrac{72}{28}-\dfrac{91}{28}=\dfrac{-19}{28}\)

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