Question

quy đồng mẫu số sau

5/7 và 4/9

5/3 và 7/15

3/2;2/3 và 7/5

Answer 1

`5/7 = (5xx9)/(7xx9) = 45/63`.

`4/9 = (4xx7)/(9xx7) = 28/63`

Answer 2

MSC : `63`

`5/7 = (5xx9)/(7xx9)=45/63`

`4/9=(4xx7)/(9xx7)=28/63`

Answer 3

\(\dfrac{5}{7}=\dfrac{5\cdot9}{7\cdot9}=\dfrac{45}{63}\\ \dfrac{4}{9}=\dfrac{4\cdot7}{9\cdot7}=\dfrac{28}{63}\)

Answer 4

\(MSC:63\)

\(\dfrac{\text{5}}{7}=\) \(\dfrac{\text{5 x 9 }}{63}=\) \(\dfrac{\text{45 }}{63}\)

\(\dfrac{\text{4}}{9}=\) \(\dfrac{\text{4 x 7 }}{63}=\) \(\dfrac{\text{28 }}{63}\)

Answer 5

5/7 = 5 x 9/7 x 9= 45/ 63

 

4/9 = 4 x 7/9x7=28 / 63

Answer 6

mn ưi chú ý hai câu dứi cho mik nhé