Help mình với ạ:The perimeter of a square is 4/5 dm. What the measure of each side.( Mik cần gấp ạ )

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edge of that square is :
        4/5: 4 = 1/5 (dm)
          Answer: 1/5 dm

$Change: \dfrac45 dm = 8 cm$

$\textrm{The measure of each side is:}$

$8:4=2(cm)=0,2(dm)$

$Conclusion:0,2(dm)$

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