Dec 1: 'add the numerators'.

Dec 2: 'subtract the numerators'.

Dec 3: 'find the common denominator'.

Dec 4: 'keep the common denominator'.


Dec 5: 'multiply the numerators and denominators'.

Dec 6: 'divide the numerator by the denominator'.

Dec 7: 'multiply by the reciprocal'.

Dec 8: 'convert to a decimal'.

Dec 9: 'convert to a percentage'.

Dec 10: 'reduce to simplest form'.

Dec 11 : 'convert to an improper fraction'.

Dec 12 : 'convert to aproper fraction'.

Question 1 : 'What is the problem?'
   Why ''
   Answers  1 'adding two or more fractions'
            2 'subtracting fractions'
            3 'multiplying fractions'
            4 'dividing fractions'
            5 'expression of the fraction'

Question 2: 'In what form are the fractions?'
   Why ''
   Answers  1 'proper form'
            2 'improper form'
            3 'simplest form'
            4 'decimal form'
            5 'percentage form'


Question 3: 'Are the denominators equal?'
   Why ''
   Answers  1 'yes'
            2 'no'

Question 4: 'Can the fractions be simplified?'
   Why ''
   Answers  1 'yes'
            2 'no'

Question 5: 'What form should the final answer be in?'
   Why ''
   Answers  1 'proper fraction'
            2 'improper fraction'
            3 'decimal form'
            4 'simplest form'
            5 'percentage'

Rule 1:
   Why ''
   IF (q1a1 or q1a2) and q3a2 THEN d3.

Rule 2:
   Why ''
   IF (q1a1 or q1a2) and q3a1 THEN d4.

Rule 3:
   Why ''
   IF q1a1 and q3a1 THEN d1.

Rule 4:
   Why ''
   IF q1a2 and q3a1 THEN d2.

Rule 5:
   Why ''
   IF q1a3 and q2a2 THEN d5.

Rule 6:
   Why ''
   IF q1a3 and q2a1 THEN d11.

Rule 7:
   Why ''
   IF q1a4 THEN d7.

Rule 8:
   Why ''
   IF q1a5 and q2a2 THEN d10.

Rule 9:
   Why ''
   IF q1a5 and q2a4 THEN d12.

Rule 10:
   Why ''
   IF q1a5 and q2a5 THEN d12.

Rule 11:
   Why ''
   IF q4a1 and q5a1 THEN d12.

Rule 12:
   Why ''
   IF q4a1 and q5a2 THEN d11.

Rule 13:
   Why ''
   IF q4a1 and q5a3 THEN d8.

Rule 14:
   Why ''
   IF q4a1 and q5a4 THEN d10.

Rule 15:
   Why ''
   IF q4a1 and q5a5 THEN d9.

Rule 16:
   Why ''
   IF q1a5 and q5a1 THEN d12.

Rule 17:
   Why ''
   IF q1a5 and q5a2 THEN d11.

Rule 18:
   Why ''
   IF q1a5 and q5a3 THEN d8.

Rule 19:
   Why ''
   IF q1a5 and q5a4 THEN d10.

Rule 20:
   Why ''
   IF q1a5 and q5a5 THEN d9.