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  • เรื่องของเค้า!

  • ทำไมต้องหาเฉลี่ย..

    ทำไมไม่เอา 20+20+20+20+20-(5+4+3+2+1) ไปเลย

  • to me... on the last one.. it's easier to do 12x3+10.... when ran into even numbers... just leave one of the end number alone and then add that to the total.

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