Question

Ivan ran three times last week. Here are the distances he ran (in kilometers).
7.2
,
10.53
,
6
What is the total distance Ivan ran on these three days?

Answer 1

7.2 + 10.53 + 6 = 23.73 kilometers. 
Hope this helps :D

Answer 2

As far as I know, you would just add the three numbers, 7.2+10.53+6= 23.73 kilometers.