1m=10dmlm^2=100dm^25.4÷100=0.054(m^2)5.4dm^2等于0.054m^2
1dm^2=0.01m^2,5.4dm^2=0.054m^2.望采纳
1dm²=1/100m²则5.4dm²=5.4×1/100m²=0.054m²
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