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Title: Unclear if this book is a good resource or not
Review: As a previous reviewer pointed out, some rather simple mistakes on the 10th problem (not corrected in the 1985ed, btw) cast a shadow on the reliability of this book. Many other problems seem to be worked out correctly, but it's beyond me to check every one. The book is helpful in spots, but the fact that they answered "105%" for "What percent of 100 is 99.5?" leaves me more than a bit unsure of their subsequent answers. As a math teacher, I would suggest a basic textbook instead of this (you'll have graphics anyway, which are critical to understanding math well).
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