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Math Help - Helping my friend

  1. #1
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    Question Helping my friend

    If the 9 key, the + key and the - key, is broken on your calculator how would you display 99?
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  2. #2
    o_O
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    33 \times 3
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  3. #3
    C.E
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    You could write 99 as 11x3x3
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