multiplications de fractions divisions de fractions - Univ-lille1

PDF	Multiplying and Dividing Fractions 18 39 39 Identity Element of Multiplication Austin said 9 12 of his toy cars were red but Ben thought 3 4 of them were red The teacher said both boys were correct Why are they both right? They are both right because 9 12 and 3 4 are equivalent fractions

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Wwwijresnet Fraction Multiplication and Division Models: A

fraction multiplication and division This practitioner reference paper examines models that are important to elementary and middle school teachers and students in the learning and understanding of fraction multiplication and division Accepted: 27 December 2016 Keywords Fraction understanding Fraction multiplication Fraction division

How difficult is multiplication & division by fractions?
According to Rule and Hallagan (2006), multiplication and division by fractions are two of the most difficult concepts in the elementary mathematics curriculum and many teachers and students do not seem to have a deep understanding of these concepts.
What is a fractional multiplication model?
It allows students to see that the multiplication of fractions results in a smaller product and helps to build fractional number sense, number sense related to fractions as opposed to whole numbers (Krach, 1998). This model can also show a visual for two fractions being close to one resulting in a product close to one.
What is a number line for fraction multiplication?
In the subtraction number line, part a, the unit for one-fifth was the whole instead of the one-fourth. The number line for fraction multiplication is different because this operation examines a part of a part of a whole. The number line shows one-fourth of a whole, then the one-fourth is divided into five equal size pieces.
Why are fractions difficult to learn?
This can be a difficult concept for students of any age to grasp conceptually. According to Lamon (2007), students have difficulty with the multiplication and division of fractions because they are in the habit of multiplication making something bigger and division making something smaller.

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Exo7 - Cours de mathématiques

4 Arithmétique 45 1 Division euclidienne et pgcd la multiplication usuelle avec la convention suivante : i2 = −1 1 3 termine avec les fractions rationnelles : une fraction rationnelle est le quotient de deux polynômes Dans ce Le cours et les vidéos ont été financés par l'université de Lille 1 et Unisciel Ce livre est