Question

[Bảo Lê]

6/21- -12/44 + 10/14 - 1/-4- -18/33

Answer 1

[Nguyễn Lê Phước Thịnh]

\(\dfrac{6}{21}-\dfrac{-12}{44}+\dfrac{10}{14}-\dfrac{1}{-4}-\dfrac{-18}{33}\)

\(=\dfrac{2}{7}+\dfrac{5}{7}+\dfrac{3}{11}+\dfrac{1}{4}+\dfrac{6}{11}\)

\(=\dfrac{5}{4}+\dfrac{9}{11}=\dfrac{5\cdot11+9\cdot4}{44}=\dfrac{55+36}{44}=\dfrac{91}{44}\)

Answer 2

[Nguyễn Thị Thương Hoài]

   \(\dfrac{6}{21}\) - \(\dfrac{-12}{44}\) + \(\dfrac{10}{14}\) - \(\dfrac{1}{-4}\) - \(\dfrac{-18}{33}\)

= \(\dfrac{2}{7}\) + \(\dfrac{3}{11}\) + \(\dfrac{5}{7}\) + \(\dfrac{1}{4}\) + \(\dfrac{6}{11}\)

= (\(\dfrac{2}{7}\) + \(\dfrac{5}{7}\)) + (\(\dfrac{3}{11}\) + \(\dfrac{6}{11}\))  + \(\dfrac{1}{4}\)

= 1 + \(\dfrac{9}{11}\) + \(\dfrac{1}{4}\)

 = \(\dfrac{20}{11}\) + \(\dfrac{1}{4}\)

= \(\dfrac{91}{44}\)