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- Primary school mathematics 15
Primary school mathematics 15
Analysis: Divide 12cm by 3cm, and divide 12cm by 3=4 (each). It takes 3 minutes to climb a 3cm, plus 1 minute * * 4 minutes, and 4 times 4 = 16 minutes, but you don't have to rest when climbing the cup.
The formula is:12/3x (3+1)-1=15 (minutes).
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