## Non-Common Core

### Strategies for Addition & Subtraction Unit

#### Strategies for Addition & Subtraction Unit

The Strategies for Addition and Subtraction Unit involves understanding the processes of addition and subtraction in order to solve problems and answer questions such as—

• If we know all of the parts, how can we find the whole?

• If we know the whole and one of the parts, how can we find the missing part?

• Given an equation, can you create an addition or subtraction situation to match it? How can you prove it matches the equation?

## Common Core

### 1.OA.A.1

#### 1.OA.A.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

## TEKS (for Texas)

### Strategies for Addition & Subtraction Unit

#### Strategies for Addition & Subtraction Unit

The Strategies for Addition and Subtraction Unit involves understanding the processes of addition and subtraction in order to solve problems and answer questions such as:

• If we know all of the parts, how can we find the whole?

• If we know the whole and one of the parts, how can we find the missing part?

• Given an equation, can you create an addition or subtraction situation to match it? How can you prove it matches the equation?

TEKS standards covered: 1.3A, 1.3D, 1.3E, 1.3F, 1.5D, 1.5G