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About House of Calculation

This app is for learning math and arithmetic calculation problems.

#Five problem categories
[Four Arithmetic Operations] [Fraction] [Linear Equation] [Simultaneous equations] [Factorization]
Within each problem category, there are several types of problems. (For details, see the "List of problems" screen in the app.)
All problems are randomly generated.
There is no limit to the number of times you can solve a problem, so you can solve as many problems as you like.
*There are no explanations provided. Only answers are provided.

#Time Limit Mode
In addition to the normal mode, there is a time-limited mode.
You can test your skills by solving several problems within the time limit.
You can select from three time limits.

Language is available in Japanese and English. Language switching is not supported within the app. The language is switched according to the language setting of the device.