Đáp án`+`Giải thích các bước giải:

`@1m^2=1/100dam^2`

`@62m^2= 62:100=0,62dam^2`

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

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

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`@1m^2=1/100dam^2`

`@40m^2=40:100=0,4dam^2`

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

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

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`@1m^2=1/100dam^2`

`@5m^2=5:100=0,05dam^2`

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

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