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Summation sign Sigma ∑ In this math learning video I (Susanne) explain the summation sign Sigma ∑. We also calculate the sum with double sums (solving two summation signs one after the other) and I show an example of how to solve the summation sign. Mathematics explained simply. Calculating with the summation sign. 0:00 Introduction - The summation sign ∑ 0:17 How does the summation sign Sigma work? 2:15 Task 1 3:21 Task 2 4:29 Task 3 5:31 Task 4 5:57 Task 5 6:58 Task 6 (double sum) 8:42 Until the next video :) Become a channel member now and support my channel: ➤ https://www.youtube.com/mathematrick/... ???? ???? MY COMPLETE EQUIPMENT ➤ https://mathematrick.de/mein-equipment/ Feel free to support me with a few coins for a cup of tea! ???? ➤ https://www.paypal.me/MathemitSusanne ❤️ ABOUT ME ???? My Insta: @mathema_trick ???? My website: http://www.MathemaTrick.de ???? My email: [email protected] ???? My band: / moonsunband Address for business inquiries and fan mail: Susanne Scherer Gaustraße 8, F32 67655 Kaiserslautern Please send packages and parcels directly to the DHL Packstation: Susanne Scherer 1054501450 Packstation 179 67655 Kaiserslautern #Sumsign #Sigma #MathemaTrick