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How to use a 100 bead abacus-Adding Double Digit Numbers

21,257 views October 30, 2016 7:34

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ChannelJames Porter

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How to add double digit numbers with a 100 bead abacus.

About this tutorial

James Porter published this 7:34 video tutorial on October 30, 2016. It has been watched 21,257 times on YouTube.

Duration
7:34
Published
October 30, 2016
Views
21,257
Likes
197

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