Grade 4 Lesson Plan: Subtracting Multi-Digit Numbers Involving Regrouping

Objective: Students will be able to subtract multi-digit numbers involving regrouping accurately and efficiently.

Materials: - Whiteboard or chart paper - Markers or chalk - Subtraction worksheets - Manipulatives (optional) - Pencils

Engagement (10 minutes): 1. Begin the lesson by asking students if they know what subtraction is and when it is used in real-life situations. 2. Show a real-life scenario where subtraction is used, such as calculating change when buying something. 3. Ask students to share their strategies for subtracting multi-digit numbers. 4. Introduce the concept of regrouping and explain that it is used when subtracting numbers that require borrowing from the next place value.

Instruction (15 minutes): 1. Write a two-digit subtraction problem on the board, such as 57 - 29. 2. Model the regrouping process step-by-step, explaining each step as you go: a. Start by subtracting the ones place: 7 - 9. Explain that we cannot subtract 9 from 7, so we need to regroup. b. Regroup by borrowing 1 ten from the tens place, making it 4 tens. c. Add the borrowed ten to the ones place, making it 17 - 9. d. Subtract the ones place: 17 - 9 = 8. e. Subtract the tens place: 4 - 2 = 2. f. Write the final answer: 57 - 29 = 28. 3. Repeat the process with a few more examples, gradually increasing the difficulty.

Guided Practice (15 minutes): 1. Divide the class into pairs or small groups. 2. Distribute subtraction worksheets to each group. 3. Instruct students to solve the problems on the worksheet using the regrouping method taught. 4. Circulate the classroom, providing assistance and guidance as needed.

Independent Practice (15 minutes): 1. Hand out individual subtraction worksheets to each student. 2. Instruct students to complete the worksheet independently. 3. Encourage students to use the regrouping method and check their work carefully. 4. Collect the worksheets for assessment.

Questioning (10 minutes): 1. Ask students questions to assess their understanding and encourage critical thinking: a. Why is regrouping necessary in subtraction? b. Can you explain the steps involved in regrouping? c. How can you check your subtraction work for accuracy? d. Can you think of a real-life situation where regrouping might be used?

Assessment (10 minutes): 1. Review the independent practice worksheets to assess students’ understanding of subtracting multi-digit numbers involving regrouping. 2. Provide feedback and address any misconceptions or errors.

Extension (10 minutes): 1. For students who have mastered the concept, provide extension activities: a. Challenge them to solve more complex subtraction problems involving regrouping. b. Introduce word problems that require regrouping to find the solution. c. Encourage students to create their own subtraction problems and solve them using regrouping.

Note: Adjust the timing of each section based on the needs and pace of your students.