Question

Giúp mik bài 2 với ạ

Answer 1

a)\(\dfrac{3}{5}+\dfrac{4}{9}\)=\(\dfrac{47}{45}\)

Answer 2

a và b=\(\dfrac{3}{5}+\dfrac{4}{9}=\dfrac{3x9}{5x9}+\dfrac{4x5}{9x5}=\dfrac{27}{45}+\dfrac{20}{45}=\dfrac{27+20}{45}\dfrac{47}{45}\)

Answer 3

b)\(\dfrac{3}{5}+\dfrac{4}{9}=\dfrac{47}{45}\)