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Chargement... Fractions are parts of things, (Young math books)par J. Richard Dennis
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Describes, through use of diagrams and illustrations, the basic concept of fractions, specifically halves, thirds, and fourths. Aucune description trouvée dans une bibliothèque |
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Google Books — Chargement... GenresClassification décimale de Melvil (CDD)513.26Natural sciences and mathematics Mathematics Arithmetic Arithmetic operations Fractions and DecimalsClassification de la Bibliothèque du CongrèsÉvaluationMoyenne:
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This book also introduces the idea of complementary fractions. When one-third is shaded, what amount is unshaded? Fractions are explored up to the fourths.
I was glad to see the last page contained information about the author and the illustrator. The author, Dennis, is a mathematics teacher and trainer. This certainly qualifies him with the authority to write a book about fractions. I wish the book mentioned what subject his doctorate is in.
The anonymously written inside cover contains a bit of a stretch to suggest that after reading this book one half of two thirds will easily be understood as one third. Dennis has no mention of multiplying fractions like this or taking a fraction of a fraction.
This is a useful book with great shapes that students can learn from without being the workbook full of exercises that many math books are. ( )