The chapter shows two ways of doing the same calculation with fractions. It shows how to approach such calculations in a flexible manner that makes the calculations easier.
An important rule in mathematics is “Don’t blindly follow rules”. It is more important to understand what you are working with and then to choose appropriate rules to use. It doesn’t matter which rules you use, as long as you use them correctly. They will all get you to the correct solution, but some ways might be easier than others.
This website presents extracts of each chapter in the related book called Fractions For Parents. The chapters are listed on the side of this page.
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