algorithm. The 3 is divided into the 60 before anything else is done. For (6), we do no computation and just write down the answer 1. Finally, (7) requires still another algorithm. The "mixed number" is first convened to an improper fraction.
Multiplication of fractions is perhaps the simplest algorithm in all of elementary school
arithmetic. Yet the above analysis shows that the skillful arithmetician has at least seven
different ways of approaching it, depending on the numbers involved in the situation.
You and I exhibit our understanding of how to multiply fractions when we do it. We
exhibit a higher form of this same type of understanding when we use different algorithms on
problems that look similar, because we make decisions in doing so. Thus, though skill is usually
thought of as a lower order form of thinking, those who are skillful make all sorts of decisions
while performing the skills. These decisions are part of the understanding of skill. Another part
of the understanding of skill is the ability to carry out of checking procedure. Indeed, a person
does not understand a skill unless a checking procedure different from the original procedure is
known. The highest form of skill understanding is the invention of new algorithms, new procedures for obtaining answers.
algorithm. The 3 is divided into the 60 before anything else is done. For (6), we do no computation and just write down the answer 1. Finally, (7) requires still another algorithm. The "mixed number" is first convened to an improper fraction.Multiplication of fractions is perhaps the simplest algorithm in all of elementary schoolarithmetic. Yet the above analysis shows that the skillful arithmetician has at least sevendifferent ways of approaching it, depending on the numbers involved in the situation.You and I exhibit our understanding of how to multiply fractions when we do it. Weexhibit a higher form of this same type of understanding when we use different algorithms onproblems that look similar, because we make decisions in doing so. Thus, though skill is usuallythought of as a lower order form of thinking, those who are skillful make all sorts of decisionswhile performing the skills. These decisions are part of the understanding of skill. Another partof the understanding of skill is the ability to carry out of checking procedure. Indeed, a persondoes not understand a skill unless a checking procedure different from the original procedure isknown. The highest form of skill understanding is the invention of new algorithms, new procedures for obtaining answers.
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