optelaftrek

Content rating
Everyone
10+
Downloads
Content rating
Everyone
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About this app

Mental arithmetic addition and subtraction up to 100. 20 exercises chosen randomly each time. Exercises that made a mistake can be viewed at the end.
Mental arithmetic addition and subtraction up to 100.
Updated on
Aug 24, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
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  • No data collected
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  • Committed to follow the Play Families Policy