Question

Answer 1

a.\(\dfrac{4}{5}+\dfrac{2}{7}=\dfrac{28+10}{35}=\dfrac{38}{35}\)

b.\(\dfrac{1}{6}+\dfrac{5}{8}=\dfrac{4+15}{24}=\dfrac{19}{24}\)

c.\(\dfrac{5}{18}+\dfrac{7}{9}+\dfrac{13}{18}=\dfrac{5+14+13}{18}=\dfrac{32}{18}\)

Answer 2

a, 38/35

b,19/24

c, 32/18

nha

Answer 3

\(a,\dfrac{4}{5}+\dfrac{2}{7}=\dfrac{28}{35}+\dfrac{10}{35}=\dfrac{38}{35}\)

b,\(\dfrac{1}{6}+\dfrac{5}{8}=\dfrac{8}{48}+\dfrac{30}{48}=\dfrac{38}{48}=\dfrac{19}{24}\)

\(c,\dfrac{5}{18}+\dfrac{7}{9}+\dfrac{13}{18}=\dfrac{5}{18}+\dfrac{14}{18}+\dfrac{13}{18}=\dfrac{32}{18}=\dfrac{16}{9}\)