The same old story: After the summer holidays, hardly any student can remember how to calculate terms and equations. When introducing a new topic, you often find that the basics of mathematics are not mastered. Even in higher grades, there is often a lack of fundamental mathematical skills. With our "Math Basics" series, we provide you with very simple and immediately usable worksheets for effective review of basic mathematical skills. The basics are explained in such a simple and clear way that every student truly understands and internalizes them – and even does so independently. Each phenomenon is first explained in the simplest case, followed by a second example and a word problem with practical relevance. On the practice page, tasks of increasing difficulty are then offered. The progression.