\(2km^287dam^2=\left(2+\dfrac{87}{10^4}\right)km^2\)
\(9km^2456cm^2=\left(9\cdot10^6+\dfrac{456}{10^4}\right)m^2\)
\(5dam^278m^2=5.78dam^2\)
\(3m^247cm^2=3.0047m^2\)
\(7ha612m^2=7.0612ha\)
\(6km^2128m^2=\left(6+\dfrac{128}{10^6}\right)km^2\)
\(2km^287dam^2=2,0087km^2\\ 9m^2456cm^2=9,0456m^2\\ 5dam^278m^2=5,78dam^2\\ 3m^247cm^2=3,0047m^2\\ 7ha612m^2=7,012ha\\ 6km^2128m^2=6,000128km^2\)
2km vuông 87dam vuông=2,0087km vuông
9m vuông 456cm vuông=9,0456m vuông
5dam vuông 78m vuông=5,78dam vuông
3m vuông 47 cm vuông=3,0047m vuông
7ha 612m vuông=7,0612ha
6km vuông 128m vuông=6,000128km vuông
9km2456cm2=(9⋅106+456104)m29km2456cm2=(9⋅106+456104)m2
5dam278m2=5.78dam25dam278m2=5.78dam2
3m247cm2=3.0047m23m247cm2=3.0047m2
7ha612m2=7.0612ha7ha612m2=7.0612ha