Anzan Zen: Mental Math

By Ivan Terekhin on AppTrack Ninja.

Soroban Flash Anzan Trainer

Anzan Zen is a calm mental math trainer built around flash anzan, the Japanese abacus drill: numbers flash one at a time, you add them in your head and say the total out loud. Climb 20 levels, the 10 kyu to 10 dan of the Japanese exam: from two 2-digit numbers up to fifteen 3-digit numbers flashed in 3 seconds. FLASH ANZAN, 20 LEVELS Numbers appear one by one and vanish. After the last one, give the sum of them all. • Levels 1 to 20, from 10 kyu (two 2-digit numbers in 4 seconds) up to 10 dan (fifteen 3-digit numbers in 3 seconds) • Custom: 3, 5, 10 or 15 numbers, 1 to 3 digits, 1.5, 1.0, 0.7…

Categories: Education, Games

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