As we can see there are 2 rows in an abacus the top and the bottom rows, see to it that all beads in the top are up and all beads at the bottom are down. Each column of beads corresponds to certain digits starting from the right we have ones, tens, hundreds, thousands, hundred thousands. the top beads will be by fives and the bottom by ones so if you want to add 34 + 78 move 3 beads from tens column up and four beads from ones up to add 74 since adding 3 and 7 will give 10 carry over one of ten to hundreds place then move all beads on tens place down then adding 8 to four will give 12 so move one bead from tens up and move two beads from ones place down to get the answer count the number of beads from each column this gives 112.