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| View Original: | Subtracting_123456789_from_246913578_in_left-to-right_order_-_Step_1.jpg (1832x2748) | |||
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| Keywords: abacus beads subtraction subtract difference computation indoor photo border In this exercise I'm showing how to compute 246913578 minus 123456789 = 123456789 on the giant Soda Hall abacus. I subtract in left-to-right order, first subtracting 1 in the leftmost column, then 2 in the next column to the right, etc. In this series, I am not present - this makes it less obvious what was changed, but does not occlude the abacus. CC0 waiver: To the extent possible under law, I waive all copyright and related or neighboring rights to this work. In this exercise I'm showing how to compute 246913578 minus 123456789 = 123456789 on the giant Soda Hall abacus. I subtract in left-to-right order, first subtracting 1 in the leftmost column, then 2 in the next column to the right, etc. In this series, I am not present - this makes it less obvious what was changed, but does not occlude the abacus. CC0 waiver: To the extent possible under law, I waive all copyright and related or neighboring rights to this work. | ||||
