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About Addition and subtraction

A unique application for practicing addition and subtraction for all ages.

Peculiarities:
- No ready-made answers - stimulates mental processes
- Select the difficulty of examples: counting to ten, moving through ten, adding and subtracting two-digit and single-digit numbers, counting to one hundred
- Timing to respond, taking into account the complexity of the example
- Selection of questions for training, taking into account previous answers
- Safe space to practice without judgment
- Assessment exam
- Exam history to monitor progress
- Laconic, minimalistic interface
- Takes up very little space on the phone