Reviews basic arithmetic skills and carries them to high levels. Also covers topics of measurement, factoring, decimals, percentage, ratio, proportion, powers, roots, and geometry. For grades 5 and 6. Good mastery of this book takes a child higher than a usual grade 6 level.
Ray's New Practical Arithmetic
Edition: 1870's and early 1880's
Author: Joseph Ray, MD
Age: 10, 11
Grade: 5th, 6th