This is a mathematics application for children of 12 years, designed to help them to study mathematics. It is the final exam for all children of 12 years old.

Children will learn about numbers, their values, and how to count. They will also learn the decimal system, the metric system, and the units of measurement.

This application is divided into several topics, which are divided into several subtopics. Each subtopic is made up of several topics, and each topic is made up of several sections. The topics that are presented in this application are:

1. Natural numbers.

2. Approximation and rounding.

3. Properties of addition and subtraction.

4. Multiplication by two figures.

5. Multiplication problems.

. Divide a 4-digit number by another 2, and by a 3-digit number.

7. Combined operations.

8. Powers, squares, and cubes.

9. Powers of base 10.

10. Polynomial decomposition of a number.

11. Operations with powers.

1. Square root.

1. Exact roots and integer roots.

14. Decimal numbers.

15. Comparison and ordering of decimals.

1. Approximation by rounding of decimals.

17. Mean, median, mode, and range.

18. Chance and probability.

19. Sure, possible, impossible, and Probability of an event.