Goal: Think like a mathematician! Look for repetition in your calculation process then generalize the regularity.
Lucy earns money babysitting. When she thought about the amount of money she earned over 3 weekends, she noticed that the first weekend she earned 1/3 as much money as she did the second weekend. The third weekend, she earned the same amount as the first 2 weekends together. How much money did she earn each weekend if she earned $192 total? (Have students try some numbers, track their calculations, and look for regularity in their calculations.)
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