a)
4m2 = 400dm2
400 + 3 = 403 dm2
=> 52dm2 < 4m23dm2
b)
1/2 km2 = 500 000m2
=> 1/2 km2 > 500m2
\(52dm^2< 4m^23dm^2\)
\(\dfrac{1}{2}km^2>500m^2\)
`a)4 m^2 3dm^2=4xx100+3=403 dm^2`
Vì `52 < 403`
Nên `52 dm^2 < 4m^2 3dm^2`
`b)1/2 km^2=1/2xx1000000=500000 m^2`
Vì `500000 > 500`
`=>1/2 km^2 > 500 m^2`