Lesson Plan of Subtraction
Subject Mathematics
Grade III
Students` Learning Outcomes
 Subtract numbers up to 4digits (without borrowing) vertically and horizontally.
Information for Teachers
 To subtract 4digit 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 2digit and 3digit 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 4digit numbers?
 After their response, conclude that the procedure of subtraction of 2digfit and 3digit numbers isplicable to the subtraction of 4digit 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
 Subtract vertically:
 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:


 2321 from 6853
 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:


 Subtract 6315 from 7568 vertically
 Subtract 4350 from 86999 horizontally.

Follow up
 Subtract five hundred and four from five thousand, nine hundred and sixtyseven.
Ask the students to solve the questions given in their notebooks