To convert Amelie's race time into total seconds, you start by converting the full minutes into seconds, and then add the remaining seconds.
Amelie ran for 5 minutes and 12 seconds.
1 minute is equal to 60 seconds.
Step 1: Convert minutes to seconds.
5 minutes = 5 × 60 seconds/minute
Now, perform the multiplication:
5 × 60 = 300 seconds
Step 2: Add the remaining seconds to the total.
Amelie also ran an additional 12 seconds.
So, add the 12 seconds to the 300 seconds previously calculated:
300 seconds + 12 seconds = 312 seconds
Therefore, it took Amelie 312 seconds to run the race.
