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                | LESSONS: | * calculator link |  | 
        
          | • | Integers (opposites, additive inverse, double negatives, order, info to know) |  | 
        
          | • | Rounding Integers (includes rounding negative numbers) |  | 
        
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          | • | Rational Numbers (definition, arithmetic procedures - numeric, conceptual, graphic) |  | 
        
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