Grade 6
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Expressions & Equations
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Geometry
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The Number System
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Ratios & Proportional Relationships
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Statistics & Probability
CCSS Math Standard: 6.NS.6.a
Recognize opposite signs of numbers as indicating locations on opposite sides of 0 on the number line; recognize that the opposite of the opposite of a number is the number itself, e.g., –(–3) = 3, and that 0 is its own opposite.