Updated for 2020, plus 2, Minus 2 relates counting by 2 to addition and subtraction.

Plus 2, Minus 2 relates counting by 2 to addition and subtraction.

MATHEMATICS / ALGEBRA This book is written for a very broad audience. There are no particular prerequisites for reading this book. We hope students of High Schools, Colleges, and Universities, as well as hobby mathematicians, will like and benefit from this book. The book is rigorous and self-contained. All results are proved (or the proofs are optional exercises) and stated as theorems. Important points are covered by examples and optional exercises. Additionally there are also two sections called More optional exercises (with answers). Modern technology uses complex numbers for just about everything. Actually, there is no way one can formulate quantum mechanics without resorting to complex numbers. Leonard Euler (1707-1786) considered it natural to introduce students to complex numbers much earlier than we do today. Even in his elementary algebra textbook he uses complex numbers throughout the book. Nils K. Oeijord is a science writer and a former assistant professor of mathematics at Tromsoe College, Norway. He is the author of The Very Basics of Tensors, and several other books in English and Norwegian. Nils K. Oeijord is the discoverer of the general genetic catastrophe (GGC).

This first collection of Banyai's memorable pictures is a tribute to this dazzlingly gifted illustrator, a transplanted Hungarian who sees America with fresh eyes - and whose art uniquely speaks for our time.".

This classic study notes the origin of a mathematical symbol, the competition it encountered, its spread among writers in different countries, its rise to popularity, and its eventual decline or ultimate survival. 1929 edition.

This book explains and illustrates how Indonesia as the largest and most populous country in Southeast Asia can become independent of fossil fuels by both reducing its energy needs and using renewable resources. A study presented in this work focuses on the Maluku Archipelago in eastern Indonesia with Ambon as its capital. Conventional energy is brought to the islands over long distances by partly simple means as boats, ships and aircrafts. This unsustainable situation calls for a decentralized renewable energy supply strategy. Based on the research presented in this book, it is clear that the archipelago has the potential to become a so-called plus-minus region. Plus-minus regions are regions that produce more renewable energy than they need and capture more CO2 than they emit. The authors are convinced that the presented strategy illustrated on the Maluku Archipelago can be transferred to other regions of the world and that only by developing plus-minus regions the international 2°C climate goal can be achieved. The model region thus serves as proof that the plus-minus target can also be achieved in emerging countries with limited financial resources.

This supplementary workbook is for children ages six and up, and has reproducible pages to give students an opportunity to learn the math facts. The addition and subtraction facts to 18 are taught in an original way-not just drill and practice, but by grouping and associating them with easy-to-learn methods and tricks. Each page was carefully designed; the facts are introduced with a trick and then those facts are practiced by trick name with previously learned facts, also identified by their trick name. After initial instruction, teachers/parents can assign workbook pages for class work or homework to give children practice and review. Not all students will need to do all of the pages. Cumulative practice pages include most, if not all, of the tricks taught to that point. The children will see that they can be successful in completing pages without counting on fingers or using a chart. This book will complement any mathematics curriculum, and is a perfect resource for parents, teachers, special education, and home school programs.Included in the book: Introduction, How to Use the Book, 232 workbook pages, Answer keys, Certificate of Mastery, Record-Keeping pages, Index