Reasoning About Multiplication & Division

Grades 3-5 / Math / Strategies
CCSS: Math.3.OA.B.5

Common Core State Standards

Math

Math

3

Grade 3

OA

Operations & Algebraic Thinking

B

Understand properties of multiplication and the relationship between multiplication and division

5

Apply properties of operations as strategies to multiply and divide. (Students need not use formal terms for these properties.) Examples: If 6 × 4 = 24 is known, then 4 × 6 = 24 is also known. (Commutative property of multiplication.) 3 × 5 × 2 can be found by 3 × 5 = 15, then 15 × 2 = 30, or by 5 × 2 = 10, then 3 × 10 = 30. (Associative property of multiplication.) Knowing that 8 × 5 = 40 and 8 × 2 = 16, one can find 8 × 7 as 8 × (5 + 2) = (8 × 5) + (8 × 2) = 40 + 16 = 56. (Distributive property.)

Download Common Core State Standards (PDF 1.2 MB)
Lesson Objective
Build understanding of multiplication and division
Length
7 min
Questions to Consider
How do Mr. Crandall's students learn from each other?
Mr. Crandall says it's important to give students time to make sense of their ideas. How does he do that?
How does Mr. Crandall give students opportunities to revise their thinking?
Common Core Standards
Math.3.OA.B.5

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  • Reasoning About Multiplication & Division Transcript

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Lesson Idea (Common Core) Reasoning About Multiplication & Division

Grades 3-5 / Math / Strategies

Reasoning About Multiplication & Division