Adding and Subtracting Expressions

---

• Gr7-Digits-UnitC-7.3&7.4-ExEx-lesson.pdf - 453 kB
• Gr7-Digits-UnitC-7.3&7.4-ExEx-lesson-editable.docx - 457 kB
• Gr7-Digits-UnitC-7.3&7.4-ExEx-activity-sheets.pdf - 209 kB

---

Title	Adding and Subtracting Expressions
Description	• CCSS.Math.Content.7.EE.A.1 Apply properties of operations as strategies to add, subtract, factor, and expand linear expressions with rational coefficients. • CCSS.Math.Content.7.EE.A.2 Understand that rewriting an expression in different forms in a problem context can shed light on the problem and how the quantities in it are related.
Subject	Mathematics
Level	Middle School
Type	Guided Activity
Duration	60 minutes
Answers Included	No
Language	English
Keywords	adding expressions, equivalent expressions, expressions, like terms, subtracting expressions
Simulation(s)	Expression Exchange (HTML5)

---

Author(s)	Amanda McGarry
Contact Email	amanda.mcgarry@colorado.edu
School / Organization	PhET
Date submitted	9/10/18
Date updated	9/10/18