Multiples of 10 and 11 are self-evident, needing no actual memorization or calculation (you basically either double the digit, or add a zero to it). And multiples of 12 appear many times in real life (eitehr as hours of N days, or as months of N years) so that we become accustomed to them before having to learn them anyway…
Multiples of 10 and 11 are self-evident, needing no actual memorization or calculation (you basically either double the digit, or add a zero to it). And multiples of 12 appear many times in real life (eitehr as hours of N days, or as months of N years) so that we become accustomed to them before having to learn them anyway...