# EdThings.com

## Lesson Plan: Represent and Solve Addition and Subtraction Word Problems

Grade: 2nd Standard: CCSS.MATH.CONTENT.2.OA.A.1

## Objective:

Students will be able to represent and solve one- and two-step addition and subtraction word problems using drawings and equations with an unknown number. This lesson plan 2.OA.A.1 focuses on developing problem-solving skills in young learners.

## Materials:

– Whiteboard or chart paper – Markers – Manipulatives (e.g., counters, cubes, etc.) – Addition and subtraction word problem cards or worksheet – Make your own, use the Worksheet, – Equation cards – Pencils – Worksheets (optional)

## Warm-up (5 minutes):

1. Begin the lesson plan 2.OA.A.1 by reviewing addition and subtraction with the students. 2. Ask the students to share examples of addition and subtraction word problems they have encountered before. 3. Write a simple addition and subtraction word problem on the board and solve it together as a class.

## Introduction (10 minutes):

1. Explain to the students that today they will be learning how to represent and solve addition and subtraction word problems using drawings and equations. 2. Show the students an example of a word problem and ask them to identify the key information and what operation (addition or subtraction) needs to be used to solve it. 3. Model how to represent the word problem using drawings and equations on the board. 4. Emphasize the importance of using a symbol for the unknown number in the equation.

## Guided Practice (15 minutes):

1. Divide the students into pairs or small groups. 2. Distribute the addition and subtraction word problem cards to each group. 3. Instruct the students to read the word problem, discuss it with their group, and represent it using drawings and equations on a piece of paper. 4. Circulate around the room to provide support and guidance as needed. 5. After the students have completed their representations, have them share their work with the class.

## Independent Practice (15 minutes):

1. Distribute the equation cards and manipulatives to each student. 2. Give each student a different addition or subtraction word problem. 3. Instruct the students to use the manipulatives to solve the word problem and represent it using an equation on their equation card. 4. Encourage the students to use the symbol for the unknown number in their equation. 5. Circulate around the room to provide support and guidance as needed.

## Application of Lesson Plan 2.OA.A.1:

1. Emphasize to the students the practical application of the lesson plan 2.OA.A.1 in solving real-world problems. 2. Provide scenarios where addition and subtraction are used in daily life and ask students to create their own word problems.

## Closure (5 minutes):

1. Gather the students back together as a whole group. 2. Ask a few students to share their equations and explain how they solved their word problems. 3. Review the importance of representing word problems using drawings and equations with an unknown number. 4. Summarize the key points of the lesson and remind the students to practice representing and solving addition and subtraction word problems at home.

## Extension:

1. Provide the students with worksheets containing additional addition and subtraction word problems to solve using drawings and equations. 2. Assign a word problem as homework and have the students solve it using drawings and equations.

## Teacher’s Experience:

In my experience teaching this lesson plan 2.OA.A.1, I’ve found that students greatly benefit from hands-on practice with manipulatives. It helps them visualize the problems and understand the concept of an unknown number. One student, who initially struggled with word problems, began to show significant improvement after consistently using drawings and manipulatives. By the end of the unit, this student was confidently solving one- and two-step word problems independently.