Đáp án + Giải thích các bước giải:

`a,3ha  5dam^2`

`=(3xx10  000)m^2+(5xx100)m^2`

`=30  000m^2+500  m^2`

`=30  500m^2`

$\\$

`b,12m^2  15dm^2`

`=12m^2+(15:100)m^2`

`=12m^2+0,15m^2`

`=12,15m^2`

$\\$

`c,4m^2  203cm^2`

`=4m^2+(203:10  000)m^2`

`=4m^2+0,0203m^2`

`=4,0203m^2`

$\\$

`d,5,35km^2`

`=(5,35xx1  000  000)m^2`

`=5  350  000m^2`

$\\$

`e,5,6m^2  34cm^2`

`=(5,6xx100)dm^2+(34:100)dm^2`

`=560dm^2+0,34dm^2`

`=560,34dm^2`

$\\$

`g,8ha  45m^2`

`=8ha+(45:10  000)ha`

`=8ha+0,0045ha`

`=8,0045ha`

`a ) 3ha 5dam^2 = 30000m^2 + 500m^2 = 30500m^2`

`b ) 12m^2 15dm^2 = 12m^2 + 15/100m^2 = 12,15m^2`

`c ) 4m^2 203cm^2 = 4m^2 + 203/10000m^2 = 4,0203m^2`

`d ) 5,35km^2 = 5,35 xx 100 00 00m^2 = 535 00 00m^2`

`e ) 5,6m^2 34cm^2 = 560dm^2 + 34/100dm^2 = 560,34dm^2`

`g ) 8ha 45m^2 = 8ha + 45/10000ha = 8,0045ha`

`------`

`1ha = 100 00m^2 => 1m^2 = 1/10000ha`

`1dam^2 = 100m^2`

`1m^2 = 100dm^2 => 1dm^2 = 1/100m^2`

`1m^2 = 10000cm^2 => 1cm^2 = 1/10000m^2`

`1km^2 = 100 00 00 m^2`

`#dtkc`