Multi-use trainer. Subtraction within 100

The multi-use trainer is a convenient tool for preschool preparation for children. With this book, the child will learn arithmetic, specifically subtraction.

By completing exercises from the notebook, the future school student:

Will master counting within a hundred, learn to subtract numbers in the classical way, as well as in columns.
Will learn what the difference of numbers is.
Will master subtraction with borrowing over ten.