\(a,\dfrac{2}{8}+\dfrac{1}{3}+\dfrac{1}{4}=\dfrac{6}{24}+\dfrac{8}{24}+\dfrac{6}{24}=\dfrac{6+8+6}{24}=\dfrac{20}{24}=\dfrac{5}{6}\)
\(b,\dfrac{5}{7}+\dfrac{4}{3}+\dfrac{5}{7}=\dfrac{15}{21}+\dfrac{28}{21}+\dfrac{15}{21}=\dfrac{15+28+15}{21}=\dfrac{58}{21}\)
a: =1/4+1/4+1/3
=1/2+1/3=5/6
b: =10/7+4/3
=30/21+28/21
=58/21
a 2/8+1/3+1/4
=2/12+1/4
=5/6.
b 5/7+4/3+5/7
=5/7x2+4/3
=10/7+4/3
=58/21.