Question

Mn giúp mik giải câu 2 với ạ

Answer 1

\(a,\dfrac{1}{3}+\dfrac{1}{5}=\dfrac{5}{15}+\dfrac{3}{15}=\dfrac{8}{15}\)

\(b,\dfrac{11}{8}-\dfrac{3}{4}=\dfrac{11}{8}-\dfrac{6}{8}=\dfrac{5}{8}\)

 

Answer 2

\(c,6\dfrac{1}{5}x\dfrac{5}{31}=\dfrac{31}{5}x\dfrac{5}{31}=1\)

Answer 3

\(\dfrac{3}{4}:\dfrac{5}{7}=\dfrac{3}{4}x\dfrac{7}{5}=\dfrac{21}{20}\)