"Baa! Baa!" Ten of the sheep Clarissa was counting to fall asleep have appeared in her bedroom. And she's still awake! "You're not trying hard enough," they tell her. "Try pairs of alpacas". But as Clarissa follows instructions and counts alpacas by...
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Bibliothek der Pädagogischen Hochschule Heidelberg
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"Baa! Baa!" Ten of the sheep Clarissa was counting to fall asleep have appeared in her bedroom. And she's still awake! "You're not trying hard enough," they tell her. "Try pairs of alpacas". But as Clarissa follows instructions and counts alpacas by twos, llamas by fives, and yaks by tens, her situation just gets more and more ridiculous. Could the key to Clarissa's dilemma lie in subtraction?
