b. Visualizing the basal units.
c. Accuracy in reduction.
6. Nature of the Problems.
References: Smith, Handbook to Arithmetics, p. 43.
XIX. The Work of the Fifth School Year
1. Leading Mathematical Features.
2. Necessity for and Nature of Preliminary Review.
3. Number Space. Modern Tendencies in Using Large Numbers.
4. Nature of the Review of the Four Operations.
a. Suggestions for rapid addition and subtraction.