Question

a) 6/8 + 3/5 = 

b ) 6/7 - 2/3=

giúp mình vs đag gấp

Answer 1

a: =3/4+3/5=15/20+12/20=27/20

b: =18/21-14/21=4/21

Answer 2

a)

\(\dfrac{6}{8}+\dfrac{3}{5}\)

\(=\dfrac{30}{40}+\dfrac{24}{40}\)

\(=\dfrac{27}{20}\)

b)

\(\dfrac{6}{7}-\dfrac{2}{3}\)

\(=\dfrac{18}{21}-\dfrac{14}{21}\)

\(=\dfrac{4}{21}\)