Question

Answer 1

\(\dfrac{3}{4}+\dfrac{2}{3}=\dfrac{9+8}{12}=\dfrac{17}{12}.\\ \dfrac{3}{5}+\dfrac{7}{10}=\dfrac{6+7}{10}=\dfrac{13}{10}.\\ \dfrac{1}{4}+\dfrac{7}{6}=\dfrac{3+14}{12}=\dfrac{17}{12}.\)

\(\dfrac{2}{3}-\dfrac{2}{7}=\dfrac{14-6}{21}=\dfrac{8}{21}.\\ \dfrac{3}{4}-\dfrac{5}{12}=\dfrac{9-5}{12}=\dfrac{4}{12}=\dfrac{1}{3}.\\ \dfrac{5}{6}-\dfrac{2}{9}=\dfrac{15-4}{18}=\dfrac{11}{18}.\)

Answer 2

23−27=14−621=821.34−512=9−512=412=13.56−29=15−418=1118.