Download or read book 1999 Abacus Year 4 / P5: Textbook Number 1 written by Ruth Merttens and published by Ginn. This book was released on 2000-04-14 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: These textbooks allow independent practice of mathematical skills. They present the concepts at an appropriate reading level. Activities with an investigative or process-skill focus encourage creative and mathematical thinking. Problem-solving is included.