I.down1[美 daʊn, 英 daʊn]副down often appears as the second element of certain verb structures in English (back down, clamp down, tone down, etc). For translations, see the relevant verb entry (back, clamp, tone, etc).
So, a transaction totalling $1.02 would round down to $1, but a purchase of $1.03 would round up to $1.05, while $1.07 would round down to $1.05 and a purchase of $1.08 would round up to $1.10.
To calculate the number of armies drafted for number of territories owned, players divide their total number of territories by three and round down to the nearest integer.