'To add 14 to another number, shift 4 beads on the 1s wire & 1 bead on the 10s wire'
an abacus
HOW DO YOU WORK THIS THING?: To add 14 to another number, shift 4 beads on the 1s wire & 1 bead on the 10s wire
To add 14 to another number, shift 4 beads on the 1s wire & 1 bead on the 10s wire
To add 14 to another number, shift 4 beads on the 1s wire & 1 bead on the 10s wire
HOW DO YOU WORK THIS THING?
an abacus
HOW DO YOU WORK THIS THING?