Subtraction word problems

Subtraction word problems arise in any situations where there is a loss or a decrease of something as a result of deducting a number from another. Think of subtraction as removing parts from a whole. Consider the following word problem.
Subtraction word problems

In the problem above, Sebastian has 8 pencils and he gives away 5 pencils to his friends. Sebastian is experiencing a loss of 5 pencils, so the subtraction problem to solve to get the answer is 8 - 5 and 8 - 5 = 3. Sebastian is left with 3 pencils.

Here are a few more interesting subtraction word problems along with their solutions.


Problem #1:

Peter has 20 dollars in his pocket. He buys a 32 ounces vanilla ice cream for 8 dollars from the best ice cream shop in the neighborhood. How much is Peter's change?

Solution

In this situation, Peter is also experiencing a loss because some money will be taken away from him for the ice cream.

Therefore, we need to do this subtraction to get the answer: 20 - 8. This subtraction requires regrouping since you cannot remove eight from zero.

subtraction-image

Peter's change = 20 - 8 = 12 dollars.

Problem #2:

Suppose that a car dealer has an inventory of 15,258 Honda Accord they have to sell by the end of 2008. Suppose they don't meet their goals and sell only 12456 Honda Accord by the end of 2008. How many cars are left in the backyard of the car dealer?

Solution

In this situation, we are removing parts from a whole to get the leftover.

Therefore, we need to do this subtraction to get the answer: 15258 - 12456. This subtraction also requires regrouping since you cannot remove four hundreds from two hundreds.

subtraction-image

Number of cars in the back yard = 15258 - 12456 = 2802

Problem #3

At a local supermarket, a box of cereal usually costs 5.56 dollars. This week, the supermarket sells the box of cereal for 3.42 dollars. How much money will you save if you buy this cereal at this supermarket?

Solution

Once again, in this situation, there is a decrease in the price.

Therefore, we need to do this subtraction in order to get the answer: 5.56 - 3.42. This is a straightforward subtraction with no regrouping!

subtraction-image

Saving = 5.56 - 3.42 = 2.14 dollars


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