Adding decimals!

Today for maths I practiced my decimals using a number line this task (activity) was made for us by student teachers from the university of auckland in the task we had to add decimals with the help of the number line it was very fun and interesting.
My Feed back for the student teachers:
In the slides the number line was short of numbers and it didn't add up to why I had to highlight the box red but I did write the answer at the top thank you.