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` 2 dam^2 16 m^2= = 2,16 dam^2`

Vì `16 :100= 0,16 `

Nên

`2 dam^2 + 0,16 dam^2 = 2,16 dam^2`

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`8 dam^2 62 m^2= 8, 62 dam^2`

Vì ` 62 :100 = 0,62 `

Nên

`8 dam^2 + 0,62 dam^2= 8,62 dam^2`

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` 52 dam^2 40 m^2 = 52,4dam^2`

Vì `40:100= 0,4 `

Nên 

`52 dam^2 + 0,4 dam^2= 52,4 dam^2`

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`46 dam^2 5m^2 = 46, 05 dam^2`

Vì `5:100= 0,05 `

Nên 

`46 dam^2+ 0,05 dam^2= 46,05 dam^2`

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`16 dam^2 29 m^2= 16,29 dam^2`

Vì `29:100= 0,29`

Nên

`16dam^2 + 0,29 dam^2= 16,29dam^2`

______________

`36 dam^2 9m^2= 36,09 dam^2`

Vì `9:100=0,09 `

Nên

`36dam^2 + 0,09 dam^2= 36,09 dam^2`

_________________

`3km^2 4cm^2 = 30000, 000004 dam^2`

Vì ` 3 km^2= 30000 dam^2`

`4cm^2= 0,000004 dam^2 `

Nên

`30000 dam^2+ 0,000004 dam^2=  30000,000004 dam^2`

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`13 hm^2 24 dm^2=1300,0024 dam^2`

Vì `13hm^2= 1300dam^2`

`24 dm^2= 0,0024dam^2`

Nên

`1300 dam^2 + 0,0024 dam^2= 1300,0024dam^2`

`2 dam^2 16m^2 = 2,16 dam^2`

`8 dam^2 62m^2 = 8,62dam^2`

`52 dam^2 40m^2 = 52,4 dam^2`

`46dam^2 5m^2 = 46, 05 dam^2`

`16 dam^2 29m^2 = 16,29 dam^2`

`36 dam^2 9m^2 = 36,09 dam^2`

`3km^2 4cm^2 = 30000,000004 dam^2`

`13 hm^2 24dm^2 = 1300, 0024 dam^2`

`***` Công thức:

`@ 1km^2 = 10000 dam^2`

`@ 1hm^2 = 100 dam^2`

`@ 1m^2 = 0,01 dam^2`

`@ 1dm^2 =0,0001 dam^2`

`@ 1cm^2 = 0,000001 dam^2`