Keywords: abacus beads addition add sum computation indoor photo border I'm now adding 8 in the 8th position from the left. This is done in 3 steps: add 50, subtract 40, subtract 2. In this step I subtract 40 by subtracting 4 in the 7th position from the left. CC0 waiver: To the extent possible under law, I waive all copyright and related or neighboring rights to this work. I'm now adding 8 in the 8th position from the left. This is done in 3 steps: add 50, subtract 40, subtract 2. In this step I subtract 40 by subtracting 4 in the 7th position from the left. CC0 waiver: To the extent possible under law, I waive all copyright and related or neighboring rights to this work. |