Do not worry at all, knowing abacus. Abacus easy for beginners to learn and you do not know. Abacus is too soon to see step-by-step, you can do it easily. Is gonna be easier if you learn abacus mental arithmetic?
Numbers painted on the bottom of the balloon to move the abacus together fires balloon. Abacus beginners guide arrow drawn can learn and easy to see instructions. Mental arithmetic mode multiplying mode, too.