Lesson 9

Working with Signed Numbers

These materials, when encountered before Algebra 1, Unit 6, Lesson 9 support success in that lesson.

View Student Lesson

Lesson Narrative

In Algebra 1, students build on the skills from grade 7 involving applying the distributive property when signed numbers are involved and combining like terms. The purpose of this lesson is to revisit, refresh, and practice that grade 7 work in preparation. For example, in Algebra 1, students are expected to expand expressions like \((x+4)(x-5)\). In grade 7, they encountered expressions like \(\text-2x(x-5)\).


Learning Goals

Teacher Facing

  • Practice expanding and factoring using the distributive property (with diagrams for support) with terms that have negative coefficients.
  • Recall multiplication of positive and negative numbers.
  • Rewrite subtraction expressions as adding the opposite.

Student Facing

  • Let’s work with signed numbers.

CCSS Standards

Addressing

Building Towards

Print Formatted Materials

For access, consult one of our IM Certified Partners.

Additional Resources

Google Slides

For access, consult one of our IM Certified Partners.
PowerPoint Slides

For access, consult one of our IM Certified Partners.