Reasoning About Multiplication & Division
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 Idea  Common CorePreparation for Fraction MultiplicationGrades 35 / Math / ScaffoldingMath.5.NF.B.4 / Math.5.NF.B.6
 123
 10

Lesson Idea (Common Core)Leprechaun Traps: Addition Within 100Grades K2 / Math / ReasoningMath.1.NBT.C.4 / Math.Practice.MP2 / Math.Practice.MP3
 494
 51

Lesson Idea (Common Core)Chessboard Algebra and Function MachinesGrades 35 / Math / FunctionsMath.4.OA.A.2 / Math.4.OA.C.5
 7
 5

Lesson Idea (Common Core)Conjecturing About FunctionsGrades 68 / Math / ReasoningMath.8.F.B.4 / Math.Practice.MP2 / Math.Practice.MP3
 77
 28

Lesson Idea (Common Core)Multiplying Whole Numbers & FractionsGrades 35 / Math / ReasoningMath.4.NF.B.4b / Math.Practice.MP2 / Math.Practice.MP3
 221
 33

Teaching PracticeHand Gestures: Movements Make Math MemorableGrades K5 / Math / Retention
 86
 13

Lesson Idea (Common Core)Reasoning About DivisionGrades 35 / Math / StrategiesMath.4.NBT.B.6
 772
 94

Lesson IdeaFibonacci Numbers: Identifying PatternsGrades 68 / Math / Sequences
 14
 12
 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
Teacher & School Info

Drew Crandall
 School Details
 Lakeridge Elementary School Seattle, WA
 Population
 420 students
 District Spending
 $8,208
Supporting Materials

Reasoning About Multiplication & Division Transcript
Embed This Tch Video on Your Site
Just copy the code below and paste it into your html code where you want the video to appear. This latest code supports iPad, iPhone, Flash and more.
Lesson Idea (Common Core) Reasoning About Multiplication & Division
Grades 35 / Math / Strategies