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

 

Answer 2

\(\dfrac{9}{14}-\dfrac{5}{8}+\dfrac{3}{7}=\dfrac{36}{56}-\dfrac{35}{56}+\dfrac{24}{56}=\dfrac{25}{56}\)

\(\dfrac{2}{9}-\dfrac{7}{10}+\dfrac{4}{5}=\dfrac{20}{90}-\dfrac{63}{90}+\dfrac{72}{90}=\dfrac{29}{90}\)

\(\dfrac{8}{19}+\dfrac{7}{5}-\dfrac{9}{20}+\dfrac{11}{12}=\dfrac{8}{19}+\dfrac{84}{60}-\dfrac{27}{60}+\dfrac{55}{60}=\dfrac{8}{19}+\dfrac{112}{60}=\dfrac{8}{19}+\dfrac{28}{15}=\dfrac{652}{285}\)

Answer 3

9/14-5/8+3/7=36/56-35/56+24/56=25/56

2/9-7/10+4/5=20/90-63/90+72/90=29/90

8/19+7/5-9/20+11/12

=480/1140+1596/1140-513/1140+1045/1140=2608/1140