300 examples in mathematics. 4th grade. Time, distance, area, speed, weight and volume

One of the most difficult tasks in elementary school is to learn concepts: time, distance, speed, area, weight, volume, learn to measure them in different units, as well as transfer one units to others.
The proposed manual will help the child easily and simply To master these and other necessary calculations. Carrying out all the tasks sequentially, the child will solve about 3000 examples.
Each topic of the section of the manual includes the definition of concepts, the main units of measurement and their ratios, as well as examples and tasks that will ensure a strong consolidation of the assumed material and teach it easy to use it not only In the lessons at school, but also in everyday life. For self -testing at the end of the book there are answers.
The manual can be used in lessons, as well as for homework