This is an app to practice sash crossing, which is learned in High School Mathematics I.
This app is developed with a focus on sashing in the process of factorization.
The introductory mode is the mode where the coefficient of x squared is 1.
Standard mode is the mode in which questions are asked in textbooks, problem sets, regular tests, etc.
Random is a mode that also includes more difficult problems.
If you turn on automatic sash calculation, you can check the calculation automatically.
If you turn it off, you can practice mental arithmetic.
The numbers you enter are in overwrite mode, and you can change them by using the arrow keys or by tapping where you want to enter.
Please note that because questions are created using random numbers, the same question may be asked, or questions where the coefficient of x is 0 may be asked.
If you have any problems or improvements, please feel free to contact us.
However, please note that since I am a beginner in app development, I cannot implement difficult functions.
This app is a completely free app that does not use advertisements in the main game.
Since the development costs are self-financed, we would be happy if you could support us by watching advertisements or making payments using the button at the top left of the app.
However, cheering will not change the game content.
You will accumulate "support points", so it will be encouraging if you share your screenshots on SNS etc.
This app is used as a teaching material at school, so no BGM or sound effects are used in the main game.
However, please be careful as there may be sound when displaying advertisements.
If you would like to introduce it at your school as part of the GIGA School Initiative, the developer will be happy if you let us know via the inquiry form.