This book comprehensively covers the requirements of the current Tanzanian Primary School syllabus for Mathematics Standard 6. Like similar books for lower classes, this book is competence-based and easy to read and understand. Concepts are explained thoroughly and in simple language to ensure that the pupil can grasp the theory with ease. Examples are picked from everyday situations to help the pupil see how Mathematics is part of everyday life, and there are plenty of exercises for the pupil to practise on and test his/her understanding. The prominent feature of our books is engagement of the pupil. Through the use of many examples, plenty of activities and exercise, we guarantee that not only will the pupil gain knowledge from the book, but also apply it in real life. This way, the pupils can use the knowledge they get from the book