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# Numerical Expression Evaluation with Basic Operations

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Practice Numerical Expression Evaluation with Basic Operations
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Spin Cycle

Credit: jim212jim
Source: http://www.flickr.com/photos/65484630@N00/146210872

Your parents have had enough. They want you to start doing your own laundry. So, you’ll just throw a bunch of your dirty clothes in the washer, dump in some soap, and hit the “start” button, right? You could do laundry that way—if you wanted to ruin your clothes. In laundry, like in math, order matters.

#### The Right Way to Wash Clothes

Credit: Michael Gabler
Source: http://commons.wikimedia.org/wiki/File:Hallig_Hooge,_Germany,_view_from_the_Backenswarft.jpg

When the washer is finished, dry the clothes. Some clothes may need to hang dry. Select the proper dryer temperature, or your favorite T-shirt may shrink. If you’ve followed the correct order of operations, you should end up with a load of clean and dry clothes, all without your parents’ help.

#### Explore More

Can you think of any other everyday tasks in which order of operations matters? Explain why the proper order of operations is crucial for completing that task.

1. [1]^ Credit: jim212jim; Source: http://www.flickr.com/photos/65484630@N00/146210872; License: CC BY-NC 3.0
2. [2]^ Credit: Michael Gabler; Source: http://commons.wikimedia.org/wiki/File:Hallig_Hooge,_Germany,_view_from_the_Backenswarft.jpg; License: CC BY-NC 3.0

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