Question

Answer 1

\(\dfrac{25}{21}\)

Answer 2

50/42 hoặc 25/21

Answer 3

\(\dfrac{6}{7}+\dfrac{2}{6}=\dfrac{36}{42}+\dfrac{14}{42}=\dfrac{36+14}{42}=\dfrac{50}{42}=\dfrac{25}{21}\)

Answer 4

\(\dfrac{6}{7}+\dfrac{2}{6}=\dfrac{6.6}{42}+\dfrac{2.7}{42}=\dfrac{36}{42}+\dfrac{14}{42}=\dfrac{50}{42}=\dfrac{25}{21}\)

Answer 5

\(\dfrac{6}{7}+\dfrac{2}{6}=\dfrac{36}{42}+\dfrac{14}{42}=\dfrac{50}{42}=\dfrac{25}{21}\)