Question

Quy đồng mẫu các phân số sau:

\(\dfrac{5}{7};\dfrac{-3}{21};\dfrac{-8}{15}\).

Answer 1

\(\dfrac{5}{7}=\dfrac{75}{105}\)

\(\dfrac{-3}{21}=\dfrac{-15}{105}\)

\(\dfrac{-8}{15}=\dfrac{-56}{105}\)

Answer 2

5/7 =75/105

-3/21= -15/105

-8/15=-56/105

Answer 3

\(\dfrac{5}{7}=\dfrac{75}{105} \\ -\dfrac{3}{21}=\dfrac{-15}{105}\\ -\dfrac{8}{15}=\dfrac{-56}{105}\)

Answer 4

5/7 =75/105

-3/21= -15/105

-8/15=-56/105