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character: Ninja Number
topic: Understanding Addition and Subtraction with Negatives
grade: 3
subject: Mathematics
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character: Addition Avenger
topic: Mastering Addition and Subtraction
grade: 3
subject: Mathematics
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character: Subtraction Samurai
topic: Exploring Negative Numbers
grade: 3
subject: Mathematics
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character: Negative Ninja
topic: Adding and Subtracting Negatives
grade: 3
subject: Mathematics
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