Indicator “Arithmetic operations: Finding the components of addition and subtraction” allows you to determine the level of formation of a basic knowledge of determining the components of addition and subtraction, understanding the relationship between them as well as the ability to check addition and subtraction correctly.
According to the results of the test, it can be stated with a high degree of probability that the student, in some cases, establishes a connection between the actions of addition and subtraction and their components. Most likely, he/she does not check the results of the calculations of the addition and subtraction operations. We can say that it is necessary to develop a skill that allows him/her to focus on the number line when finding the components of addition and subtraction and select unknown components of actions in equalities. The student is not yet able to independently establish a connection when finding the components of addition and subtraction.
To develop this skill, we recommend regular exercises with materials:

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