Speed Mathematics Simplified - Dover Science Books Author:Edwards Stoddard Entertaining, easy-to-follow suggestions for developing greater speed and accuracy in doing mathematical calculations. Surefire methods for multiplying without carrying, dividing with half the pencil work of long division, plus advice on how to add and subtract rapidly; how to check for accuracy, master fractions, work quickly with decimals, han... more »dle percentages and much more. A valuable how-to book for anyone working with numbers on a variety of levels.« less