■ IntroductionWith this app, you can easily enjoy the mental arithmetic ability test, mental arithmetic, reading aloud calculation, flash mental arithmetic, and multiplication table check. Since we have an abacus, you can actually calculate it, or you can calculate using the actual abacus and answer using the apps abacus. Questions are always displayed as new ones, making it a perfect app for math practice.■ Equipped with practice modeWe have added a function to teach how to use the abacus so that even those who have never touched the abacus can use it. This makes it easy for beginners to use. (There are several schools of teaching, so an example is shown.)■ Can be used for the Chinese Zhusuan ability testIt covers all grades from 1st to 10th grades that are actually asked in the Zhusuan ability test and 11th to 16th grades that can surely step up.■ Can be used for mental arithmetic testIt covers all grades from 1st to 10th grades that are actually asked in the Chinese Zhusuan ability test.■ Can read aloudSince you can actually read aloud, you can practice reading aloud. You can also control the number of digits and the number of problem displays, so you can solve the problem that suits you.■ Flash mental arithmetic is possibleYou can solve the actual flash mental arithmetic. You can also control the number of digits, the number of problem displays, the display speed, etc., so you can step up to suit yourself.■ For other calculation problemsIt can also be used as a math problem.