Weekly Maths Problem

On the Walking for Friends Walk we measured the tree trunks of some trees. An Oak was 1.45m in circumference, a Silver Birch measured 76cm, a Yew measured 4500mm, a Scots Pine was 56cm. Order the trees in size from the smallest to largest.

You can share your answers here on Facebook or with me as I visit during the week. Remember you need to show your workings out to get the maximum points.