By far the most popular and well-stocked category of used instruments is our selection of guitars, where we've got a huge variety of all the big names. Used Gibson Les Paul, pre-owned Fender Telecaster and secondhand Stratocaster guitars are commonly found within these pages, waiting for their new homes with players and collectors.
22/7 is a pretty decent choice for teaching 11-year-olds about fractions that are close to pi. 355/113 would be better, if you think they can remember numbers that big. And approxRational is fun. Exercise for the interested reader: implement an inverse to approxRational.
Simplifying Algebraic Fractions. 1  1. Find a common factor in the numerator, or top part of the fraction. 2  2. Find a common factor in the denominator. 3  3. Remove like terms.  4. Know when the equation is fully 1  simplified. 5. Try a practice problem.