Question

I started cooking at4:55 PM I finish cooking at 6:18 PM how long did I cook

Answer 1

You need to subtract times.
If you need to borrow an hour, borrow and hour, and add 60 minutes to the minute part. Then subtract.

6:18 pm - 4:55 pm

Borrow 1 hour from the 6 hours leaving 5 hours.
The borrowed hour is 60 minutes.
Add the 60 minutes to the 18 minutes making 78 minutes.
Now you are subtracting 4:55 from 5:78.
Subtract 4 from 5 to give you hours.
Subtract 55 from 78 to give you minutes.

     6:18             5:78
-    4:55          -  4:55
----------          ---------
                         1:23

Answer: You cooked for 1 hour and 23 minutes.

Answer 2

5 minutes until 5, 60 minutes until 6, and 18 minutes until 6:18. that means it is 83 minutes