Question

tinh bang cach hop ly nhat 1/25+7/3+4/25

 

Answer 1

`1/25 + 7/3 + 4/25`

`=(1/25 + 4/25) + 7/3`

`=5/25 + 7/3`

`=1/5 + 7/3`

`=3/15 + 35/15`

`=(35+3)/15`

`=38/15`

Answer 2

\(\dfrac{1}{25}+\dfrac{7}{3}+\dfrac{4}{25}\)

\(=\left(\dfrac{1}{25}+\dfrac{4}{25}\right)+\dfrac{7}{3}\)

\(=\dfrac{1}{5}+\dfrac{7}{3}\)

\(=\dfrac{3}{15}+\dfrac{35}{15}\)

\(=\dfrac{3+35}{15}=\dfrac{38}{15}\)

Answer 3

\(\dfrac{1}{25}+\dfrac{7}{3}+\dfrac{4}{25}=\) 

\(=\left(\dfrac{1}{25}+\dfrac{4}{25}\right)+\dfrac{7}{3}\) 

\(=\dfrac{5}{25}+\dfrac{7}{3}\) 

\(=\dfrac{1}{5}+\dfrac{7}{3}\) 

\(=\dfrac{3}{15}+\dfrac{35}{15}\) 

\(=\dfrac{38}{15}\)