Grade 3 Math TEKS 3.5A:Addition and Subtraction Problems

Learning Target: I can represent a one-step addition or subtraction problem using models.

Focuses On:

• Understanding language in real-world problems that indicate certain operations
• Translating word problems to models with an unknown
• Representing equations with part-whole models and number line models

Builds On:

2.7D:

Represent and solve addition and subtraction word problems where unknowns may be any one of the terms in the problem

Next Level:

4.5A:

Represent multi-step problems involving the four operations with whole numbers using strip diagrams and equations with a letter standing for the unknown quantity

Read More:

This lesson is designed to help solve real-world problems by using models to represent equations. It sets students up to understand an unknown can happen in any location of an equation and prepares students to see "unknowns" in later grades (ie. algebra).

The two instructional blocks in this lesson focus on part-whole models and number line models.

In the first instructional block, students use part-part-whole models to help organize a problem to make it easier to determine what the problem is asking.

The second instructional block focuses on number line models to show what is happening in a problem and to represent the addition and subtraction steps needed to solve a problem.

Scaffolds and supports such as tape diagrams and number lines are intentionally built throughout the lesson to support conceptual learning.  

Learning Target: I can represent a two-step addition and subtraction problem using equations.

Focuses On:

• Understanding language in real-world problems that indicate certain operations
• Translating word problems into equations with an unknown
• Solving problems involving tables

Builds On:

2.7D:

Represent and solve addition and subtraction word problems where unknowns may be any one of the terms in the problem

Next Level:

4.5A:

Represent multi-step problems involving the four operations with whole numbers using strip diagrams and equations with a letter standing for the unknown quantity

Read More:

This lesson is designed to help build connections between real-world problems and equations. It sets students up to understand an unknown can happen in any location of an equation and prepares students to see "unknowns" in later grades (ie. algebra).

The two instructional blocks in this lesson focus on two-step problems using equations and table equations  

In the first instructional block, students use a system of steps in order determine what is happening in a word problem including what operations will be required to solve the problem, and what is the unknown in the problem.

The second instructional block focuses on solving problems that include a table of information. In some cases, students will create a table to assist them in solving a problem and in other situations, there will be missing information that students can solve for.

Scaffolds and supports such as pictorial representations of tables and are intentionally built throughout the lesson to support conceptual learning.  

Learning Target: I can represent a two-step addition and subtraction problem using models.

Focuses On:

• Understanding language in real-world problems that indicate certain operations
• Translating word problems to models with an unknown
• Representing equations with part-whole models and number line models

Builds On:

2.7D:

Represent and solve addition and subtraction word problems where unknowns may be any one of the terms in the problem

Next Level:

4.5A:

Represent multi-step problems involving the four operations with whole numbers using strip diagrams and equations with a letter standing for the unknown quantity

Read More:

This lesson is designed to help build connections between real-world problems and equations. It sets students up to understand an unknown can happen in any location of an equation and prepares students to see "unknowns" in later grades (ie. algebra). The work in this lesson is done through models including tape diagrams and number lines.

The two instructional blocks in this lesson focus on part-whole models and number line models.

In the first instructional block, students use part-part-part-whole models to help organize a problem to make it easier to determine what the problem is asking.

The second instructional block focuses on number line models to show what is happening in a problem and to represent the addition and subtraction steps needed to solve a problem.

Scaffolds and supports such as tape diagrams and number lines are intentionally built throughout the lesson to support conceptual learning.  

Learning Target: I can represent a one-step addition or subtraction problem with an equations.

Focuses On:

• Understanding language in real-world problems that indicate certain operations
• Translating word problems to equations with an unknown

Builds On:

2.7D:

Represent and solve addition and subtraction word problems where unknowns may be any one of the terms in the problem

Next Level:

4.5A:

Represent multi-step problems involving the four operations with whole numbers using strip diagrams and equations with a letter standing for the unknown quantity

Read More:

This lesson is designed to help build connections between real-world problems and equations. It sets students up to understand an unknown can happen in any location of an equation and prepares students to see "unknowns" in later grades (ie. algebra).

The instructional blocks in this lesson focus on setting up equations. Students turn word problems into math sentences using numbers, symbols and unknowns. Using a system of steps to decide what is happening in the problem and where the unknown is located within the problem are strategies that students will use to assist them in writing equations.

Scaffolds and supports such as example problems and supported expressions are intentionally built throughout the lesson to support student understanding.