# WRITING REAL WORLD PROBLEMS

## About "Writing real world problems"

Writing real world problems :

To solve real world problems, we will write equations which represent the given situation.

In this section we are going to see, how we can write a real world problem when an equation is given.

This stuff will help the students to improve their creativity and have better understanding on real world problems and equations.

## Writing real world problems - Examples

Example 1 :

Write a real-world problem for the equation 21.79 + x = 25.

Solution :

Step 1 :

Examine each part of the equation.

x is the unknown or quantity we are looking for.

" = 25 " means that after adding 21.79 and x, the result is 25.

Step 2 :

Write a real-world situation that involves adding two quantities.

Joshua wants to buy his mother flowers and a card for Mother’s Day. Joshua has \$25 to spend and selects roses for \$21.79.

How much can he spend on a card ?

Let x represent that amount.

Step 3 :

Solve the equation.

Joshua can spend \$3.21 on a Mother’s Day card.

Example 2 :

Write a real-world problem for the equation x - 47  =  18

Solution :

Step 1 :

Examine each part of the equation.

x is the unknown or quantity we are looking for.

47 is subtracted from x.

" = 18 " means that after subtracting 47 from x, the result is 18.

Step 2 :

Write a real-world situation that involves adding two quantities.

Sarah used a gift card to buy \$47 worth of food. She has \$18 left on her gift card. Write an equation to represent this situation.

How much did she have in her card initially ?

Let x represent that amount.

Step 3 :

Solve the equation.

Sarah had \$65 in her card initially.

Example 3 :

Write a real-world problem for the equation 2h  =  8

Solution :

Step 1 :

Examine each part of the equation.

h is the unknown or quantity we are looking for.

h is multiplied by 2.

" = 8 " means that after having multiplied 2 and h, the result is 8.

Step 2 :

Write a real-world situation that involves adding two quantities.

Kim rented skates for h hours. The rental fee was \$2 per hour. She paid a total of \$8.

For how many hours did she rent skates ?

Step 3 :

Solve the equation 2h  =  8.

Divide by "2" on both sides

2h/2  =  8/2

h  =  4

Hence, Kim rented skates for 4 hours.

After having gone through the stuff given above, we hope that the students would have understood "Writing real world problems".

Apart from the stuff given in this section, if you need any other stuff in math, please use our google custom search here.

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