Устный счет 2

Oral account simulator. Account within 100. Addition and subtraction. Multiplication and division. The improved analogue of the exercise book “3000 Math Examples”. Observed continuity of levels.

- automatic validation of answers
- explanation of errors
- automatic calculation of exercise time
- the ability to select the number of examples in the exercise
- saving results
- sound information about the correct decision or error

Six difficulty levels:
1. Addition and subtraction within 20 (repetition)
2. Addition and subtraction of two-digit and single-digit
3. Addition and subtraction of numbers, one of which is round
4. Addition and subtraction within 100
5. Multiplication and division by one number
6. Multiplication and division of arbitrary numbers