12-28-2021, 11:21 AM
5:2 abaci work perfectly well for base 10. On the other hand, 4:1 abaci don't really work at all for anything above base 10, so the 5:2 abacus will give you more flexibility.
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Best abacus to buy
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Best abacus to buy - by sachiek - 12-28-2021, 10:40 AM
RE: Best abacus to buy - by ttchrist69 - 12-28-2021, 11:21 AM
RE: Best abacus to buy - by Kevin - 12-28-2021, 11:23 AM
RE: Best abacus to buy - by curved_time - 12-28-2021, 11:25 AM
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