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Nabu's Knee-knockerNabu's Knee-knocker


Make ten number cards for the ten digits:


  1. Put the ten number cards in this addition problem. Use all the cards, each card once.

    • What is the greatest possible sum?
      What is the least possible sum?

    • How close to 2000 can you make the sum?

    • Can you get a sum of 9000?


  2. Put the ten number cards in this rectangular array so that sums across and down are all 17.



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