Đáp án:
$\begin{array}{l}
1)\\
a)7km\,35m = 7035m\\
430cm = 4m\,30cm\\
b)5 tấn \,65kg = 5065kg\\
13049kg = 13\,tấn \,49kg\\
2)\\
a)5m18cm > 520cm\left( S \right)\\
Do:5m18cm = 518cm < 520cm\\
b)4\,tấn \,30kg < 4300kg\left( D \right)\\
Do:4\,tấn 30kg = 4030kg < 4300kg\\
c)7km500m < 8km\left( D \right)\\
Do:7km500m = 7500m < 8000m\\
d)6\,tạ\,6kg = 660kg\left( D \right)\\
3)\\
a)D.605m{m^2}\\
b)3\,tấn \,5kg = 3005kg\\
\Leftrightarrow C\\
c)4060m = 4km60m\\
\Leftrightarrow A\\
d)7h{m^2}35{m^2} = 70035{m^2}\\
\Leftrightarrow B\\
4)\\
3da{m^2} = 300{m^2}\\
8h{m^2} = 800da{m^2}\\
5c{m^2} = 500m{m^2}\\
12c{m^2} = 1200m{m^2}\\
700{m^2} = 7da{m^2}\\
4000da{m^2} = 40h{m^2}\\
400m{m^2} = 4c{m^2}\\
2300m{m^2} = 23c{m^2}\\
5)\\
a)\\
6{m^2} = 0,06da{m^2}\\
31m{m^2} = 0,31c{m^2}\\
b)\\
27cm = 0,27m\\
513g = 0,513kg
\end{array}$
