Introduction to Proofs
Grade 9Math45 min
Learning Objective
I can identify and apply properties such as the associative and transitive properties to justify algebraic steps.
Lesson Flow
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Basic Number Properties for Algebra
Professor Dave Explains
Practice
7 questions • Short answer
Exit Ticket
“Identify the property that justifies the equivalence: 5 + (x + 3) = (5 + x) + 3 Identify the property that justifies the equivalence: 7x + 0 = 7x ”
Teacher Guide
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- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
