4 ms·
The Romans also used the abacus for numeric calculations: https://en.wikipedia.org/wiki/Roman_abacus https://en.wikipedia.org/wiki/Roman_abacus
by DonaldFisk 7y ago
The Romans also used the abacus for numeric calculations: https://en.wikipedia.org/wiki/Roman_abacus https://en.wikipedia.org/wiki/Roman_abacus