Question

\(\dfrac{2}{5}\) + \(\dfrac{3}{10}\) - \(\dfrac{1}{2}\)

ghi chi tiết giúp mk với ạ

 

Answer 1

\(=\dfrac{4}{10}+\dfrac{3}{10}-\dfrac{5}{10}=\dfrac{7}{10}-\dfrac{5}{10}=\dfrac{2}{10}=\dfrac{1}{5}\)

Answer 2

= 7/10 - 1/2

= 1/5

Answer 3

=4/10+3/10-5/10

=4+3-5/10=2/10=1/5