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Rosanne makes 1 1 2 liters of strawberry lemonade. She pours 1 4 of a liter of lemonade into a thermos to take to the park. Her brother drinks 2 5 of the remaining lemonade. How much lemonade does Rosanne's brother drink?

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sqdancefan

Answer:

  1/2 liter

Step-by-step explanation:

If she starts with 1 1/2 liters and removes 1/4 liter, the remaining amount is ...

  (1 1/2) -(1/4) = 1 2/4 -1/4 = 1 1/4 . . . liters.

The brother drinks 2/5 of that, so drinks ...

  (2/5)(1 1/4 L) = (2/5)(5/4 L) = 2/4 L = 1/2 L

Rosanne's brother drinks 1/2 L of the lemonade.

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