This video shows a very simple, straight forward method of checking multiplication. It is simple to use thi...
This video shows a very simple, straight forward method of checking multiplication. It is simple to use this method to check both small and large calculations using mental arithmetic. It provides a 100% proof that a calculation is wrong and a strong indication it is correct. The method can be adapted to check division. I'll post an explaination if needed.
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- 10 Jul 2017
- 205 180
Share Video
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- 17 Jan 2012
- 755 631
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- 5 Oct 2020
- 112 893
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- 11 Aug 2019
- 1 742 291
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- 801 629
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- 8 814
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0:27
- 30 Sep 2018
- 276 745
Share Video
23 photos
- 6 Mar 2018
- 329 102
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26 photos
- 8 Jan 2021
- 38 977
Share Gallery
27 photos
- 5 Nov 2019
- 1 318 777
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