character: Number Ninja
topic: Using Compatible Numbers for Estimation
grade: 3
subject: Mathematics
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character: Estimation Explorer
topic: Rounding Numbers for Simple Estimation
grade: 3
subject: Mathematics
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character: Math Magician
topic: Strategies for Mental Math Estimation
grade: 3
subject: Mathematics
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character: Calculator Kid
topic: Using a Calculator to Check Estimations
grade: 3
subject: Mathematics
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