Question

9 phan 14 + 8 phan 21

13 phan 15 - 7 phan 12

Answer 1

\(\dfrac{9}{14}+\dfrac{8}{21}=\dfrac{27}{42}+\dfrac{16}{42}=\dfrac{43}{42}\)

\(\dfrac{13}{15}-\dfrac{7}{12}=\dfrac{52}{60}-\dfrac{35}{60}=\dfrac{17}{60}\)

Answer 2

\(\dfrac{9}{14}+\dfrac{8}{21}=\dfrac{27}{42}+\dfrac{16}{42}=\dfrac{43}{42}\)

\(\dfrac{13}{15}-\dfrac{7}{12}=\dfrac{52}{60}-\dfrac{35}{60}=\dfrac{17}{60}\)

#hn