Question

 9/14 - 5/8 + 3/7  

2/9 - 7/10 + 4/5                           8/19 + 7/5 - 9/20 + 11/12

Answer 1

giúp tui với

Answer 2

\(-\dfrac{11}{12}+\dfrac{7}{8}+\dfrac{1}{10}\)

\(=-\dfrac{1}{24}+\dfrac{1}{10}\)

\(=\dfrac{7}{120}\)

Answer 3

\(-\dfrac{11}{12}+\dfrac{7}{8}+\dfrac{1}{10}=-\dfrac{880}{960}+\dfrac{840}{960}+\dfrac{96}{960}=\dfrac{56}{960}=\dfrac{7}{120}\)

Answer 4

\(\dfrac{-11}{12}+\dfrac{7}{8}+\dfrac{1}{10}\)

\(=\dfrac{-22}{24}+\dfrac{21}{24}+\dfrac{1}{10}\)

\(=\dfrac{-1}{24}+\dfrac{1}{10}\)

\(=\dfrac{-5}{120}+\dfrac{12}{120}\)

\(=\dfrac{7}{120}\)

Answer 5

giúp tui

Answer 6

\(\dfrac{9}{14}-\dfrac{5}{8}+\dfrac{3}{7}\)

\(=\dfrac{36}{56}-\dfrac{35}{56}+\dfrac{24}{56}\)

\(=\dfrac{25}{56}\)

____________________

\(\dfrac{2}{9}-\dfrac{7}{10}+\dfrac{4}{5}\)

\(=\dfrac{20}{90}-\dfrac{63}{90}+\dfrac{72}{90}\)

\(=\dfrac{29}{90}\)

____________________

\(\dfrac{8}{19}+\dfrac{7}{5}-\dfrac{9}{20}+\dfrac{11}{12}\)

\(=\dfrac{173}{95}-\dfrac{9}{20}+\dfrac{11}{12}\)

\(=\dfrac{521}{380}+\dfrac{11}{12}\)

\(=\dfrac{652}{285}\)