Discussion
Find the value of \(99 + 999 + 9999 + 99999\).
Answer: A
Write each term as a power of ten less one.
\[ (100-1) + (1000-1) + (10{,}000-1) + (100{,}000-1) \]
\[ = 111{,}100 - 4 = 111{,}096 \]
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