Keywords: abacus hat beads addition add sum computation Here I'm demonstrating add 8 and 8. I start with 3 lower beads and 1 upper bead in the ones position, indicating 8. I then add 10 (a single lower bead in the tens position). In the next step, I will subtract 2. CC0 waiver: To the extent possible under law, I waive all copyright and related or neighboring rights to this work. Here I'm demonstrating add 8 and 8. I start with 3 lower beads and 1 upper bead in the ones position, indicating 8. I then add 10 (a single lower bead in the tens position). In the next step, I will subtract 2. CC0 waiver: To the extent possible under law, I waive all copyright and related or neighboring rights to this work. |