Addition simulator vs Study Chey

App for all ages, to train columnar addition. Having two numbers, this app checks every single step of their addition, highlights the current column, and immediately signals if a calculation error occurs. Currently there are two modes: - normal, where you input the addends manually; - random, where the addends are generated automatically. For your convenience, you can choose a background of the app. In future versions oа the app, operational modes will be extended, as well as the overall app functionality.

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