The objective of this exercices is mesure the street width of Casp, Pau Claris and Gran Via .The procedure of this exercice is this:
1-Mesure the steps of the students
2-Work out the total steps of the childrens
3-Do theall the results
First of all we mesure
Know we explain the results:

We can see that Gran Via is the biggest street because is a main street with a lot of traffic.
The Pau Claris is the segon stree more biggest, and Casp is the last.