#
Grade 2 Math Samples

## Non-Common Core

### Algebraic Reasoning Unit

#### Algebraic Reasoning Unit

The Algebraic Reasoning Unit involves understanding number patterns within properties of numbers and operations in order to answer questions such as:

- How can you prove this number is odd or even?

- How can you use the relationship between addition and subtraction to solve problems in which the unknown may be any one of the terms in the equation?

- Give an equation in which the unknown may be any one of its terms, how can you create a situation to match it? How can you prove that your situation matches the equation?

- How can you show ___ is an even/odd number?

- What strategies can you use to determine a number is odd or even?

- What happens when you add two like odd or even numbers?

## Common Core

### 2.OA.A.1

#### 2.OA.A.1

Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

## TEKS (for Texas)

### Algebraic Reasoning Unit

#### Algebraic Reasoning Unit

The Algebraic Reasoning Unit involves understanding number patterns within properties of numbers and operations in order to answer questions such as:

- How can you prove this number is odd or even?

- How can you use the relationship between addition and subtraction to solve problems in which the unknown may be any one of the terms in the equation?

- Give an equation in which the unknown may be any one of its terms, how can you create a situation to match it? How can you prove that your situation matches the equation?

TEKS standards covered: 2.7A, 2.7C