Question

Answer 1

b: <

Answer 2

7m2 9 dm2 > 80 dm2

2m2 25 dm2 < 250 dm2

Answer 3

2m² 25dm² < 250dm²

7m² 9dm² > 80dm²

Answer 4

`7m^2` `9dm^2` `>` `80dm^2`

`1m^2=100dm^2`

`7m^2=100xx7=700dm^2`

`700(dm^2)+9(dm^2)=709dm^2`

`709dm^2>80dm^2`

Nên : `7m^2` `9dm^2` `>` `80dm^2`

____________________________

`2m^2` `25dm^2<250dm^2`

`1m^2=100dm^2`

`2m^2=100xx2=200dm^2`

`200dm^2+25dm^2=225dm^2`

`225dm^2<250dm^2`

Nên : `2m^2` `25dm^2<250dm^2`