Unused, no writing. [Content Introduction] This reference book is a textbook for thoroughly mastering the basics of arithmetic for junior high school entrance exams. In particular, it focuses on explaining points that are easy to stumble on, and also includes master problems to deepen understanding. [Features] - Carefully explains the basic concepts of arithmetic using easy-to-understand explanations and concrete examples. - Each chapter has problem exercises, allowing for practical learning. - Features a "stumbling check" function, allowing you to proceed while checking your understanding. - Title: Arithmetic from the Basics: Overcoming Difficulties - Publisher: Gakken - ISBN: 978-4-05-300983-1 - Price: ¥990 - Content: Explanation of problems and master problems using the sum and difference method. Thank you for viewing.