Math in the News. This is the archive of our "Math in the News" current events weekly series.
These presentations can be viewed as PowerPoint presentations from Slideshare, as videos from YouTube, or as iPad-compatible presentations. Click on the appropriate link to see the Math in the News presentation. Math in the News: 2/25/13. n this issue of Math in the News we look at statistics related to Russian meteor that recently crash-landed. Watch some compelling eyewitness video and explore how the path of meteor was reconstructed. The presentation also includes links to the following Web Sites: YouTube Video: www.youtube.com/watch? Analyzing the path of the meteor: See the Math in the News Slideshare version of this presentation. See the YouTube video of this presentation. iPad and mobile users, click here. Subscribe to our YouTube video channel to see all of our great videos! Math in the News: 2/9/13. The CDC Website: Math in the News: 11/16/12. Math in the News: 10/31/12. Math in the News: 10/27/12. Mathematics in Everyday Life. Tareasplus: Matematicas, Fisica y Quimica.
21st Century Educator. Here are some tools which I've either used (or explored) for mathematics education.
They aren't all open source, but they are all extremely useful, and they are all free to use (free as in free beer, some of them are also free as in free speech). Geogebra This program lets you explore algebra and geometry, much like it's proprietary cousin, Geometer's Sketchpad. Having used both, I actually prefer Geogebra because I find it to be more flexible and easier to use. It requires Java to run, and can either run in a web browser with no download, or you can install it to your computer using the offline installer. Mathematics Visualization Toolkit The Mathematics Visualization Toolkit is exactly that, a program which lets you visualize mathematics. Scratch Scratch is an excellent program for learning programming but also mathematics like variables, sequences, Cartesian coordinates, and other useful mathematical concepts.
Netlogo Audacity Audacity is an open source audio editor and recorder. Www.divulgamat.net. Exponents Calculator. Example entries -42 or (-4)2 will result in different answers.
Note that -42 = -1 * 4 * 4 = -16 while (-4)2 = (-4) * (-4) = 16. See notes below. This is an online calculator with exponents. "When a minus sign occurs with exponential notation, a certain caution is in order. For example, (-4)2 means that -4 is to be raised to the second power. Example: 3 raised to the power of 4 is written as 34 = 81. -4 raised to the power of 2 is written (-4)2 = 16. -3 raised to the power of 3 is written (-3)3 = -27. Exponent Laws: (Each Law for Exponents) xm * xn = xm+n xm / xn = xm-n (xm)n = xm*n (x * y)m = xm * ym (x / y)m = xm / ym x-m = 1 / xm (x / y)-m = ym / xm x1 = x x0 = 1 00 = 1 (definition) If xm = y then y = m√y = y(1/m) xm/n = n√xm References [1] Algebra and Trigonometry: A Functions Approach; M. For more detail on Exponent Theory see To calculate fractional exponents use our Fractional Exponents Calculator.
To calculate root or radicals use our Roots Calculator. Webs interactivas de Matemáticas. Matemáticas. DigitWhiz. Graficador de Funciones Matematicas. Namathis. Real World Math Problems. IXL. Free Math Worksheets.