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1) 9x3 = 3x3x3 (but that's not really simpler?)

How about 1) 9+9+9, and 2) 3+3+3+3+3+3+3+3+3?

#2 doesn't look too simple either. How about 9x3 = (10-1)x3 = 10x3-1x3 = 30-3 = 27? That one's nice.

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Q: What two simpler problems can you use to find 9x3?
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