The following is assumed as class knowledge upon which the process should be based.
1. Ability to read and write decimals.
2. Vivid knowledge of the relations of one hundred to ten, ten to one unit, one unit to one tenth, one tenth to one hundredth, etc.
3. Knowledge of the process of division of whole numbers.
4. The principle: multiplying or dividing both dividend and divisor by the same number does not change the quotient.
Preparation:—
1. Division by an integer.
a. Find the value of 1 acre of land if 15 acres cost $77115.
$ 5141
15 ) $ 77115
75
21
15
61
60
15
15