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Common Core MATH 7 NS 1b Grade 7 The Number System Apply And Extend Previous Understandings Of Operations With Fractions To Add Subtract Multiply And Divide Rational NumbersThe Number System: Apply And Extend Previous Understandings Of Operations With Fractions To Add, Subtract, Multiply, And Divide Rational Numbers.
Understand p + q as the number located a distance |q| from p, in the positive or negative direction depending on whether q is positive or negative. Show that a number and its opposite have a sum of 0 (are additive inverses). Interpret sums of rational numbers by describing real-world contexts.