To subtract time, subtract the minutes then subtract the hours.

Since we can't have negative minutes, add 60 to the minutes and subtract 1 from the hours (60 minutes = 1 hour).

First, start by adding up the total amount of time Nate spent on doing his homework.

Now, subtract minutes until the number of minutes is less than to figure out how many hours and minutes it took him to do his homework.

Because we subtracted twice, we know that he has done hours and minutes worth of homework.

To figure out when he finished doing his homework, add the hours together then add the minutes together.

So then he finished at

The first step in this process is to add two hours and fourteen minutes to pm. Simply add them together, hours first, and then minutes:

Hours

Minutes:

So we know now that Andrew made it to his office at pm. Add your final eight minutes to complete the problem:

.

The hour has not changed, so we know that Andrew arrived at his desk at pm.

First, we need to find how long it took Jimmy to finish the test.

Subtract the hours, then subtract the minutes.

Now, the question asks how many MINUTES it takes Jimmy to finish the test. Convert the hour into minutes.

First, we need to convert minutes into the combination of hours and minutes. One hour is equal to minutes therefore, we can rewrite minutes as the following:

and because

Now we need to add to .

.

Thus you wake up from your nap at .

To add time, you add the hours together, then you add the minutes together.

Because there are only 60 minutes in an hour, you cannot have a time whose minute value is greater than 60. In this case, subtract 60 minutes and add 1 more to the hour.