Visual Anzan: add columns of numbers in your head
How it works
Each task is a column of numbers, some added and some subtracted. Work out the total in your head and type it. A round lasts 8 minutes, and your score is the number of right answers.
The format follows the visual round of abacus contests such as UCMAS, where students face 200 problems in 8 minutes.
Anzan Arena needs JavaScript. / Для работы Anzan Arena нужен JavaScript.