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Lesson Plans and Worksheets for Grade 3

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More Lessons for Grade 3

Common Core For Grade 3

Videos, examples, solutions, and lessons to help Grade 3 students learn to apply properties of operations as strategies to multiply and divide. *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.)*

Common Core: 3.OA.5

- I can explain the commutative, associative, and distributive property of multiplication.
- I can apply the commutative, associative, and distributive properties to decompose, regroup, and/or reorder factors to make it easier to multiply two or more factors.
- I can explain how the operation properties can and cannot apply to division and use those properties that can apply to make it easier to find the quotient.

**Distributive Property**

**Commutative Property of Multiplication**

The order of numbers does not matter when multiplying.

**Associative Property of Multiplication**

The sum or product stays the same when grouping of addends or factors is changed.

**Distributive Property**

When multiplying a factor and a sum, you can distribute the factor across the addition.

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