145 OBJECT LESSONS IN ARITHMETIC. … NOT ONLY notation, numeration, addition, subtraction, multiplication and division can be taught with our apparatus, but also the decimal fractions can be easily explained therewith. Send for Special Circular, giving Full Directions for its Use. The New Century Busy Work. Just what the Primary…
Schools -- Furniture, equipment, etc. · Teaching Aids and devices
Internet Archive · Winterthur Museum Library · Public domain (published before 1931). Free to use for anything.
