100km= m= dm, 0,5kg= dag= g, 2h= s, 40dag= kg, 6g= dag= kg, 30s= h?

100km=100000m=10000000dm 0,5kg=50dag=500g 2h=7200s 40dag=0,4kg 6g=0,6dag=0,006kg [latex]30s= 30*frac{1}{3600} h=frac{30}{3600} h=frac{1}{120} h[/latex]