Illustrating Addition and Subtraction of Proper Fractions Using Circles

[b]Questions for Learner :[/b][br]1. How do we add two fractions of the same/common denominator ?[br]2. Explain the idea of equivalent fractions[br]3. How do we add two fractions with different denominators ?[br]4. How do we find the "right" number of parts to split, so that the parts[br] in both fractions are of the same size ? (From this we get[br] the same/common denominator for both fractions)

Information: Illustrating Addition and Subtraction of Proper Fractions Using Circles