# Lesson Plan of Subtraction

## Students` Learning Outcomes

• Subtract numbers up to 4-digits (without borrowing) vertically and horizontally.

### Information for Teachers

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

### Material / Resources

Writing board, chalk/marker, duster, chart (having subtraction question of horizontal method), Mathematics textbook

### Introduction

• Ask the following questions to the students:
• Up to how many digits you can subtract numbers?
• From where do we start subtracting the numbers, right or left?
• Collect their response and write some subtraction questions of 2-digit and 3-digit numbers (without borrowing) on the board.
• Call the students one by one to solve the questions on the board.
• Involve the remaining students to check the answers. Correct the mistakes if any.
• Write the following question on the board: • Ask the students. How will you subtract these 4-digit numbers?
• After their response, conclude that the procedure of subtraction of 2-digfit and 3-digit numbers isplicable to the subtraction of 4-digit numbers.
• Call any student to solve the question on the board, check the answer and correct the mistakes if any.
• Tell the students that this method of subtraction is called Vertical Method of Subtraction.
• Ask the students to recall the vertical and horizontal methods which they have learnt in addition. In subtraction we use the same methods.
• Let us practice vertical and horizontal methods of subtraction (without borrowing).

### Development

Activity 1

• Write the following question on the board: subtract 1653 from 2876 vertically.
• Ask the students. What will we do first to solve this question?
• After their response, tell the students that first of all we arrange the numbers in columns according to the place value and then subtract the digits in the same order.
• Solve the question on the board with the help of the students.
• Conclude the result that when we subtract the numbers in columns. This method of subtraction is called Vertical Method of Subtraction.

Activity 2

• Write the following question on the board:
• Subtract vertically:
• 2461 from 5473
• 5283 from 8396
• Call any two students to solve the questions on the board.
• Ask the remaining students to check their work and point out the mistakes if any. Encourage the students for their active participation.

Activity 3

• Display the following chart in front of the class: • Read the question and demonstrate the horizontal method of subtraction with the help of this chart.
• Tell the students that subtract ones (O) from ones, tens (T) from tens and hundreds (H) from hundreds.
• Ask the students to solve the following questions in their notebooks.
• Write in vertical form and subtract:
1. 2321 from 6853
2. 5034 from 7649
• At the end, solve these questions on the board and ask the students to check their work.
• Provide guidance to the students having mistaken.

### Sum up / Conclusion

• In vertical method of subtraction, first of all we arrange the numbers in columns according to the place value and then subtract the digits in the same order.
• In horizontal method of subtraction, first of all we arrange the numbers in rows according to the place value and then subtract the digits in the same order.

### Assessment

• Ask the students to solve the following questions in their notebooks:
1. Subtract 6315 from 7568 vertically
2. Subtract 4350 from 86999 horizontally. 