Knowing how to calculate quickly, without the need of a calculator or pen and paper is a very useful skill. Whether you need to divide a dinner bill among friends, double a recipe, compute for a discount or commission, or figure out how many more pages of your textbook you have to read, knowing math shortcuts can make your life so much easier.

The book * 25 Math Short Cuts: Practical Algebra “Tricks” for Everyday Use* contains some of the most useful tips and techniques for use in everyday life and among the easiest to master. Read through the entire book at one sitting, or try mastering one shortcut a week.

The author, * Virgilio “Ike” Y. Prudente*, is a long-time math enthusiast and the creator of the MATH-Inic Program. He is coming out with his second book, Algebra Made Easy as Arithmetic, this December.