Wie man schnell addiert (mit Sam Engel)
How to do additions like a pro!
Demonstration 14:11
Demonstration done on GMCA addition simulator. Answer is typed from right to left in blocks of two digits at a time (i.e. tens then one column then thousands then hundreds column etc. . . ).
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Finale der Berechnungsliga Saison 2 --- Kaloyan vs. Swanand
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