SOL 3.2 – *The student will recognize and use the inverse relationships between addition/subtraction to complete basic fact sentences. The student will use these relationships to solve problems.*

SOL 3.20ab – *The student will investigate the identity and the commutative properties for addition and identify examples of the identity and commutative properties for addition.*

SOL 3.4 – *The student will estimate solutions to and solve single-step and multistep problems involving the sum or difference of two whole numbers, each 9,999 or less, with or without regrouping.*

#### Using Base Ten Blocks

#### Solving Word Problems with Thinking Blocks

# IXL Activities

*Below is a list of Mr. Bradford’s recommended IXL activities for number sense and place value based on Virginia SOLs. Be sure to login on IXL before you begin!*

#### Inverse Relationship of Addition & Subtraction

#### Properties of Addition

- Commutative, Identity & Associative Properties
*Please note: We do not study associative, so think of it as a non-example of identity and/or commutative.*