Question

Quy đồng mẫu số :5/2,34/7,3/14

Answer 1

Mẫu số chung : \(14\)

 Giữ nguyên : \(\dfrac{3}{14}\)

\(\dfrac{5}{2}=\dfrac{5.7}{2.7}=\dfrac{35}{14}\\ \dfrac{34}{7}=\dfrac{34.2}{2.7}=\dfrac{68}{14}\)

Answer 2

\(\dfrac{5x7}{2x7}=\dfrac{35}{14}\)

\(\dfrac{34x2}{7x2}=\dfrac{68}{14}\)

\(Giữnguyên\dfrac{3}{14}\)

Answer 3

`MSC:14`

`5/2=[5xx7]/[2xx7]=35/14`

`34/7=[34xx2]/[7xx2]=68/14`

`3/14` giữ nguyên

Answer 4

\(\dfrac{5}{2}=\dfrac{5\times7}{2\times7}=\dfrac{35}{14}\)

\(\dfrac{34}{7}=\dfrac{34\times2}{7\times2}=\dfrac{68}{14}\)

\(\dfrac{3}{14}\) giữ nguyên

Answer 5

\(MSC:14\)

\(\dfrac{5}{2}=\dfrac{35}{14};\dfrac{34}{7}=\dfrac{68}{14};\dfrac{3}{14}=\dfrac{3}{14}\left(giữ.nguyên\right)\)

Answer 6

5/2 = 70/28

34/7 = 136/28

3/14 =  6/28

Answer 7

\(\dfrac{35}{14},\dfrac{68}{14},\dfrac{3}{14}\)

Answer 8

\(\dfrac{5}{2}=\dfrac{5\cdot7}{2\cdot7}=\dfrac{35}{14};\dfrac{34}{7}=\dfrac{34\cdot2}{7\cdot2}=\dfrac{68}{14}\)

giữ nguyên \(\dfrac{3}{14}\)