Grade 7 Mathematics Module 2, Topic A, Lesson 7

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Student Outcomes

  • Students recognize that the rules for adding and subtracting integers apply to rational numbers.
  • Given a number line, students use arrows to model rational numbers where the length of the arrow is the absolute value of the rational number and the sign of the rational number is determined by the direction of the arrow with respect to the number line.
  • Students locate the sum p + q of two rational numbers on a number line by placing the tail of the arrow for q at p and locating p + q at the head of the arrow.  They create an arrow for the difference p - q by first rewriting the difference as a sum, p + (- q), and then locating the sum.

Downloadable Resources

Common Core Learning Standards

CCLS State Standard
7.NS.1.c Understand subtraction of rational numbers as adding the additive inverse, p – q = p + (–q). Show...

Curriculum Map