Metric vs American measurements

Metric vs. American measurements

https://www.youtube.com/watch?v=YkITqGKOQTc Links to an external site. 

http://downloads.bbc.co.uk/skillswise/maths/ma21impe/images/ma21impe-l1-w-imperial-and-metric-matching-752x1065.jpg Links to an external site. 

http://www.bbc.co.uk/skillswise/topic/imperial-and-metric Links to an external site.