## Students` Learning Outcomes

• Add numbers up to 4-digits (without carrying) vertically and horizontally.

### Information for Teachers

• To add 4-digit numbers, add ones (O) into ones, tens (T) into tens, hundreds (H) into hundreds and thousands (Th) into thousands.
• In vertical method of addition, first of all we arrange the numbers in columns according to the place value and then add the digits in the same order. • In horizontal method of addition, first of all we arrange the numbers in rows according to the place value and then add the digits in the same order.
• While teaching the lesson, also consult textbook were and when applicable.

### Material / Resources

Writing board, chalk/marker, duster, chart (having example of horizontal method), mathematics textbook

### Introduction

• Up to how many digits you can add numbers?
• After their response, write some addition questions of 2-digit and 3-digit numbers (without carrying) on the board.
• Ask the students, from where do we start adding the numbers, right or left?
• Collect their feedback and call the students one by one to solve the questions on the board.
• Collect their feedback and correct the mistakes if any.
• Now write the following question on the board: • Can you add these 4-digit numbers?
• After their response, tell the students that the procedure of addition of 2-digit and 3-digit numbers is also applicable to the addition of 4-digit numbers.
• Call any student to solve the question on the board.
• Check the answer and correct the mistakes if any.
• Have you noticed that we have done addition up to 4-digit numbers using vertical method?
• Collect their feedback and conclude that this method of addition is called vertical method of addition.
• Tell the students now let us learn about vertical and horizontal methods of addition in detail with the help of example.

### Development

Activity 1

• Write a question on the board: add 2345 and 3524.
• What will we do first to solve this question?
• Collect their feedback and teoll the students that first of all we arrange the numbers in columns according to the place value and then add the digits in the same order.
• Call any student on the board and guide him/her to solve the question.
• Check the answer and point out the mistakes if any.
• Tell the students that when we add the numbers in columns, this method of addition is called Vertical Method of addition

Activity 2

• Write a question on the board: add 6345 and 3412 vertically.
• Ask the students to solve the question in their notebooks.
• After observing the students` work, solve the question on the board and ask them to check their answers.
• Appreciate the students for correct answers. Guide the students having mistaken.

Activity 3

• Write a question on the board: add 3432 and 5265 horizontally.
• Read the question and tell the students that now we will learn the addition of 4-digit numbers (without carrying) using Horizontal Method of Addition.
• Explain the students that in this method we arrange the numbers in rows according to the place value and then add the digits in the same order.
• Display the following chart in front of the class. • Demonstrate the horizontal method of addition with the help of this chart.
• Also explain the students that add ones (O) into ones, tens (T) into tens, hundreds (H) into hundreds and thousands (Th) into thousands.
• Then write some addition questions of 3-digit and 4-digit numbers on the board.
• Call any student to solve the questions using horizontal method.
• Provide guidance where necessary.
• Ensure the students for their correct understanding of the concept conveyed.
• Facilitate the students requiring further guidance.
• Pay special attention to the slow learner.

### Sum up / Conclusion

• To add 4-digit numbers, add ones (O0 into ones, tens (T) into tens, hundred (H) into hundreds and thousands (Th0 into thousands.
• In vertical method of addition, first of all we arrange the numbers in columns according to the place value and then add the digits in the same order.
• In horizontal method of addition, first of all we arrange the numbers in rows according to the place value and then add the digits in the same order.

### Assessment

• Write the following questions on the board and ask the students to solve in their notebooks.
1. Write in vertical form and add 5961 and 2005.
2. Solve horizontally: 3045 + 423 = _____________.

.