Bài 2:
\(7dam^228m^2=7dam^2+\dfrac{28}{100}dam^2=7\dfrac{28}{100}\)
\(95dam^250m^2=95dam^2+\dfrac{50}{100}dam^2=95\dfrac{50}{100}dam^2\)
\(68dam^27m^2=68dam^2+\dfrac{7}{100}dam^2=68\dfrac{7}{100}dam^2\)
\(7
dam^2
28
m^2=7,28
dam^2\)
\(95dam^250m^2=95,5dam^2\)
\(68dam^27m^2=68,7dam^2\)