# The Center of Math Blog

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## Tuesday, January 20, 2015

### Tools and techniques

What is a seemingly simple math tool or technique that has proven enormously useful to you? We asked around the office to get our employees' opinions:

source: commons.wikimedia.org

Tori: Her initial disdain for the Unit Circle has evolved into love. She remembers learning about it in 10th grade Pre-Calculus, and wondering why she would ever need it. Today, Tori is so glad for her teacher's regular unit circle quizzes- she's referenced her (completely memorized) mental unit circle countless times in university math classes.

Adam: As the Center of Math's top business guy, Adam has to say Microsoft Excel. He also brought up a second math trick: the tipping trick to determine 20% of your bill. If your total comes to \$34.50, move the decimal over one place to get \$3.45 (which is 10%) and multiply that by 2 to get \$6.90, a precise 20% tip.

Have any other tools, tricks, or techniques to make math easier? Let us know what you think in the comments.

#### 1 comment:

1. Excel is a software program from Microsoft basic excel for beginners that is a part of Microsoft Office. Excel calculations is compiled for making and altering spreadsheets that are spared with a .xls expansion. It's general uses in corporate cell-based figuring, turn tables, and different diagramming devices. With an Excel spreadsheet, you could make a month to month spending plan, track costs of doing business, or sort and compose a lot of information calculations in spreadsheets of Excels.