# Basic Arithmetic : Money and Time

## Example Questions

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### Example Question #1 : Addition And Subtraction With Time

Jimmy started taking his math test at 11:03AM, and he finished at 12:29PM. How many minutes did it take Jimmy to finish the test?

Explanation:

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.

### Example Question #1 : Addition And Subtraction With Time

Pete worked on his homework, and it took him  hour and  minutes to finish. If he started his homework at , what time did he finish his homework?

Explanation:

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.

### Example Question #1 : Addition And Subtraction With Time

If you lie down to take a nap at , and you nap for  minutes, what time will it be when you wake up?

Explanation:

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 .

### Example Question #1 : Addition And Subtraction With Time

If Andrew leaves his house at pm and it takes him exactly two hours and fourteen minutes to get to his office, and then another eight minutes to get to his desk, at what time will he be at his desk?

pm

pm

pm

pm

pm

pm

Explanation:

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.

### Example Question #1 : Addition And Subtraction With Time

Melissa started practicing piano at 3:34PM. She practiced until 5:17PM. How long did she practice for?

1 hour and 43 minutes

2 hours and 43 minutes

2 hours and 17 minutes

1 hour and 17 minutes

1 hour and 43 minutes

Explanation:

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).

### Example Question #1 : Addition And Subtraction With Time

Nate started his math, history, English, and French homework at . It took him  minutes to finish his math homework,  minutes to finish his history homework,  minutes to finish his English homework, and  minutes to finish his French homework. What time did Nate stop doing homework?

Explanation:

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

### Example Question #1 : Addition And Subtraction With Money

Jane bought a pencil for , a skirt for , a coat for , and a headband for . How much did Jane pay in total for all the items she bought?

Explanation:

Add up all the individual items.

### Example Question #1 : Addition And Subtraction With Money

Billy earned  for shoveling his driveway. He wants to buy a new toy and a candy bar, and then add the rest to his piggy bank. The new toy costs  and the candy bar costs  How much money will Billy have left over to add to his piggy bank?

Explanation:

.

After buying the candy bar he then had  left for his piggy bank,

.

### Example Question #1 : Addition And Subtraction With Money

John recently bought the following school supplies: a calculator for , a pencil bag for , a mechanical pencil for , and a set of pens for

How much did John spend in total on school supplies?

Explanation:

In order to solve this problem, you must add all of the costs of school supplies together. This can be done through the following equation:

Therefore, the total amount that John spent on school supplies is

### Example Question #1 : Money And Time

Jenny has a new job at the mall. Her first paycheck was . She bought a pair of shoes for  and a new dress for  on the weekend. How much money from her first paycheck does Jenny have left on Monday?

Explanation:

You must subtract the cost of the two purchases from the overall paycheck amount.

Begin by subtracting the shoe purchase from the total paycheck amount:

Then, subtract the cost of the dress:

is the amount of money Jenny has left from her paycheck on Monday.

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