Question

tính bằng cách thuận tiện nhất

\(\dfrac{17}{20}x\dfrac{27}{13}+\dfrac{27}{13}x\dfrac{3}{20}\)

Answer 1

\(\dfrac{17}{20}\) x \(\dfrac{27}{13}\) + \(\dfrac{27}{13}\)  x \(\dfrac{3}{20}\)

= (\(\dfrac{17}{20}\)  + \(\dfrac{3}{20}\)) x \(\dfrac{27}{13}\)

= 1 x \(\dfrac{27}{13}\)

=\(\dfrac{27}{13}\)

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