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A simple app to help you learn addition of numbers up to 20 with exciting statistics and a heatmap. The result sum doesn't exceed 23.
A student is offered a correct answer as well as a choice of answers similar to the correct one, so attention is required.
In case of a mistake, the question is put for a repetition in 3 and 10 steps after current.
No ads.
No IAP.
Works offline.
Có gì mới trong phiên bản mới nhất 2
Last updated on Sep 9, 2018
First feature-complete version 2
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Blitzrechner +
2 by Doo Reelkow
Sep 9, 2018