The key word, "approximately," indicates that we must round each of these values. Let's round to the nearest tens place because each of our answer choices is rounded to the tens place.

Shoes cost $42.64.

$42.64 rounded (down) to the nearest tens place is $40.

Pants cost $37.99.

$37.99 rounded (up) to the nearest tens place is $40.

A shirt costs $21.34.

$21.34 rounded (down) to the nearest tens place is $20.

Let's add up our estimated prices.

$40 + $40 + $20 =

$100.

To solve this problem, one should round either to the tenths place, or to the nearest dollar. can be rounded to , to , to , and to . When one adds up the estimated costs, it yields about .

Add up all the individual items.

If Betty has in her wallet and buys a sandwich that costs , the best way to determine how much money is left in her wallet is to subtract from .

An easy way to do this is to first subtract and . This results in: .

Next, should be subtracted from . This results in:

Therefore, Betty will have left in her wallet.

The flat fee for the shoes will only be paid once since the shoes will be used for all four games. The cost per game will be paid each time one game finishes and a new one is started.

To calculate her cost add the fee for the shoes and the fee for each game played. That would be $8 (shoes) + $10.50 (game 1) + $10.50 (game 2) + $10.50 (game 3) + $10.50 (game 4) = $50 (total cost).

Laura had $50 with her so there was enough money and nothing left over when she left the bowling alley.

Since the question is asking how much money did Mark have left over, we need to subtract the cost of each item he bought from $20.

There are two ways of solving this problem:

• We can add up the cost of all the ingredients and then subtract the total cost from $20.00

• We can subtract the cost of each item from $20.00. Note, if we choose to solve the problem this way, we must follow order of operations and go from left to right

Billy had . After buying the toy he had left over:

.

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

.

In order to find out how much the third frame costs, we need to subtract the cost of the first two frames ($15 and $25) from the total amount ($60).

There are two ways to subtract the cost of the first two frames from the total amount:

Method 1

We can subtract the total amount spent on the first two frames from $60

Remember to follow Order of Operations (PEMDAS) and add the numbers in parenthesis first.

The cost of the third frame was $20

Method 2

We can subtract the cost of each frame from $60

The cost of the third frame was $20

If Larry gives Jon a $10 bill to pay him back for $5.75, Jon will need to give Larry back .

If Jon gives the change in quarters, he will give him quarters.

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.