比例の実践的な演習。 3の数学学習ルール 比例した多く

2022年01月31日

10/14/2021 Optional voice added also for questions (not just for solutions).
You can select the speed of the voice, this can also be useful for those who use the app also to learn pronunciation in 17 languages.
Improvements in the interface and animations as tests are passed to stimulate the student and learn more.