Between the age of 4 and 5, children develop the ability to establish patterns that connect numbers. At this age, that is considered ideal to begin meaningful mathematical studies. If counting from one to ten is simple, then complicated types of counting – twos, fives, tens – require additional mental work. This type of counting is not just memorization of numbers. It requires reflection and understanding. This type of activity develops types of thinking such as visual-effective, visual-figurative, verbal-logical, as well as quick wits.
After analyzing the results of the test, we can say that the student does not have the skill of counting by twos, fives, tens, the student cannot accurately name the neighbors of a number in the digital series and use the skill of counting by twos, fives, tens when writing numbers on the number line.
To develop this skill, we recommend regular exercises with materials:

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