Introduction | Lesson Goals | Definitions | Procedures | Testing | Summary

Learning Procedures

1. Calculate a common denominator for two or more fractions by multiplying the numerator and denominator of a fraction by the same number without changing the value of that fraction.
    
2. Calculate a common denominator for two or more fractions by dividing the numerator and denominator of a fraction by the same number without changing the value of that fraction.
    
3. Add fractions - When denominators are alike, add the numerators and place the result over the common denominator.
    
   When denominators are not alike, find the least common denominator, and change to equivalent fractions. Then add the numerators and place the result over the common denominator.
    
4. Subtract fractions - When denominators are alike, subtract the numerators and place the result over the common denominator.
    
   When denominators are not alike, find the least common denominator, and change to equivalent fractions. Then subtract the numerators and place the result over the common denominator.
    
5. Change improper fractions to mixed numbers - Divide the numerator by the denominator, and state the result as the whole number plus the remainder over the denominator.
    
6. Change mixed numbers to improper fractions - Change the whole number to a fraction, then add the numerators of the two resulting fractions, and place them over the original denominator.

1. Lesson problems.
    
2. Standard test questions.
    
3. Review questions.

After learning basic nomenclature and definitions of terms for fractions, instruction is given for applying the basic procedures to add and subtract fractions. Then, there is instruction for changing improper fractions to mixed numbers, and vice versa. There are tests on all the learned procedures.

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