Abstract
The concept of Mathematical Skills refers to an ability when the mathematical knowledge is effectively and efficiently used to solve real problems. This ability is important for student of chemistry not only in chapters of chemical calculations.
It is used also in topics, such as molecular shapes, interpretation of statistical data, describing the properties of functions, etc. Development of Mathematical Skills is important for understanding chemistry problems.
The radiocarbon fating in archaeology is often easily understood by students, but the calculation of age of object is more difficult for them for it requires the ability of solving the exponential equation. Similarly, students often learn the sizes of bonding angles in molecules as simple facts with no attempts to deduce it.
There was created a concept of a didactic test to verify the level of mathematical skills of students of the 4th grade of grammar schools and a pilot testing was conducted.