Title: Buy this Book
Review: Every parent ought buy this book for their 7-12 year old child. It is a very, very good introduction to more elementary mathematics. I still have mine from childhood and use parts of it in my Philosophy Courses (at a rather selective university) to help explain what my above-average college students never understood--were never taught/never asked TO THINK about--in grammar school or high school. Of course, would there were similar (but deeper) books for the teen-aged set.
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