# Free 2nd Grade 2.4C Solve One-Step And Multi-Step Word Problems Involving Addition And Subtraction Within 1,000 Using A Variety Of Strategies Based On Place Value, Including Algorithms Lesson Plan (Math)

## Topic: Adding and subtracting within 1,000

### Objectives & Outcomes

• Be able to solve one-step and multi-step word problems involving addition and subtraction within 1,000 using a variety of strategies based on place value, including algorithms.
• Understand and apply the concept of place value (millions, billions, etc.) when solving word problems involving addition and subtraction within 1,000.

### Topics & Concepts

• Addition and subtraction within 1,000
• Place value (millions, billions, etc.)

### Materials

• Addition and subtraction word problems within 1,000 (one-step and multi-step)
• manipulatives (e.g., manipulatives, blocks, unifix cubes)
• Algorithms chart

### Warm-Up

• Review the concept of place value and the decimal system by showing the students a number in millions, billions, and trillions (e.g., 10,000,000,000).
• Ask the students to identify the place value for each number (ones, thousands, millions, etc.).
• Ask the students to identify the value of each digit in the number.
• Ask the students to pair up and share their strategies for solving addition and subtraction word problems within 1,000.

### Direct Instruction

• Review the strategies for solving one-step word problems involving addition and subtraction within 1,000.
• Ask the students to brainstorm and list the strategies on the board or a piece of paper.
• Go over the strategies one by one, explaining how to use each one to solve a word problem.
• Review the strategies for solving multi-step word problems involving addition and subtraction within 1,000.
• Ask the students to brainstorm and list the strategies on the board or a piece of paper.
• Go over the strategies one by one, explaining how to use each one to solve a word problem.

### Guided Practice

• Provide the students with a one-step or multi-step word problem involving addition and subtraction within 1,000, and ask them to solve it using the strategies they learned.
• Go over the solution with the class, explaining any steps or concepts that need further explanation.
• Repeat with a different problem.

### Independent Practice

• Provide the students with a number of one-step and multi-step word problems involving addition and subtraction within 1,000.
• Ask the students to solve the problems using the strategies they have learned.
• Allow the students to work independently or in pairs to solve the problems.
• Encourage the students to discuss any steps or concepts that need further explanation.
• Provide support as needed.

### Closure

• Review the importance of place value in solving word problems.
• Ask the students to share any strategies or ways of thinking that they found helpful in solving the problems.
• Encourage the students to ask for help if they are struggling with a particular problem.
• Remind the students to use their math notebooks to record their work and explain their thinking.

### Assessment

• Observe the students as they work on the independent practice problems.
• Review the students' written solutions and ask questions to see if they understand how to solve the problem.
• Give a participation grade based on the students' participation in class discussions and their willingness to try the problems.