In 19th century America, Joseph Ray was the McGuffey of arithmetic. His textbooks, used throughout the United States, laid the mathematical foundations for the generations of inventors, engineers and businessmen who would make the nation a world power.

The fundamental operations. Calculation with decimais. Approximate results in calculation. Factors, multiples and divisors. Fractions. Power and roots. Logarithms. Use of logarithms in arithmetic. Ratio and proportion. Series and progressions. Systems of common measures. Calculation with denominate numbers. Time, temperature and angle measure. Latitude, longitude and time. Dimensions and areas of plane figues. Dimensions, areas and volumes of solids. Graphs. Percentage. Compound interest.

Reprint of the original, first published in 1843.

As the public and producers becomes more aware of the environmental and economic benefits of precision farming, there has been increased demand for quality training to accurately evaluate spatial variability within fields. Practical Mathematics in Precision Farming provides hand-on training and examples for certified crop consultants (CCAs), farmers, crop consultants, and students (both undergraduate and graduate) on how to conduct to conduct and analyze on-farm studies, write simple programs, use precision techniques to scout for pests and collect soil samples, develop management zones, determine the cost of production, assess the environmental consequences of precision techniques, understand soil test results, and develop site-specific nutrient and plant population algorithms. Using real agronomic examples, the reader is taught the crucial task of managing products and inputs for application at the right rate, place, and time.

Regardless of whether they are housewives or auto mechanics, doctors or lawyers, or students or businessmen, The Smart Guide to Practical Math provides readers with responses to the questions they want answered about everyday math. From how many pounds of hamburger are required to make meatloaf to feed 12 people to how much to invest annually to be able to send a child to college, and whether it’s really a good idea to buy fuel additive for a car, this guide provides readers with practical mathematical formulas that can serve as templates for a number of real-life scenarios.