100-Square Calculation
Fill 100 squares. Race your own time.
Practise 100-square addition, subtraction, multiplication and division with a freshly shuffled grid every time, measure how long it takes you, and take on the national ranking.
Features
- A freshly shuffled set of 100 problems every time, so you never memorise the order.
- Your time is measured to the millisecond, so your personal best is clear.
- Submit to the national ranking with a nickname — no name or email required.
- The calculation practice itself works offline.
- Ads can be removed with a one-time purchase, and restored after switching devices.
Download
All four operations are in one app, and each keeps its own national ranking.
Support
For questions, bug reports, or feedback about this app, please contact us at the email address below. We usually reply within a few business days.
Contact: dev@robonet-c.jp