Lesson Plan of 4-Digit Numbers Subtraction
Subject Mathematics
Grade III
Students` Learning Outcomes
- Subtract numbers up to 4-digits (with borrowing) vertically and horizontally.
Information for Teachers
- To subtract 4-digit numbers (with borrowing):
- Firstly subtract ones. If ones in the first number are less than ones from the second number, then borrow 1 ten from the column of tens and change it for 10 ones.
- Secondly subtract tens. If tens in the first number are less than tens from the second number, then borrow 1 hundred from the column of hundreds and change it for 10 tens.
- Lastly subtract hundreds. If hundreds in the first number are less than hundreds from the second number, then borrow 1 thousand from the column of thousands and change it for 10 hundreds.
- While teaching the lesson, also consult textbook where and when applicable.
Material / Resources
Writing board, chalk/marker, duster, chart (having rules of subtraction with borrowing), Mathematics textbook
Introduction
- Write the following questions on the board:
- Ask the students` can you solve these questions? Explain, how?
- After their response, call any two students to solve the questions on the board.
- Ask the remaining students to check their work. Correct the mistakes if any.
- Conclude the result that in subtraction if the first number is less than the second number, we adopt the method of borrowing.
- Write the following question on the board:
- Call any student to solve the question on the board.
- Check the answer and tell the students that the procedure of subtraction of 2-digit and 3-digit numbers (with borrowing) is applicable to the subtraction of 4-digit numbers.
- Ask the students to tell which method of subtraction we have used.
- Collect their feedback and write the correct answer on the board.
- Ask the students to recall the vertical and horizontal methods of subtraction.
- Tell the students that let us learn subtraction up to 4-digit numbers (with borrowing) using vertical and horizontal methods with the help of examples.
Development
Activity 1
- Display the following chart in front of the class:
- Tell the rules of subtraction (with borrowing) with the help of this chart.
Activity 2
- Write the following questions on the board:
Subtract vertically:
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- 4865 from 6543
- 4178 from 7130
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- Call any two students to solve the questions on the board.
- Provide guidance where necessary.
- On completion, ask the remaining students to check the answers and correct the mistakes if any.
Activity 3
- Ask the students to solve the following question in their notebooks:
- Write in horizontal form and subtract. 1845 from 6734.
- Observe the students` work and guide the slow learners.
- At the end solve the question on the board and ask the students to check their work.
- Appreciate the students having correct answers. Facilitate the students requiring further guidance.
Sum up / Conclusion
- Revise the rules of borrowing of subtraction of 4-digit numbers with the help of chart used in activity 1.
Assessment
- Ask the students to solve the following questions in their notebooks:
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- Subtract 5668 from 7116 vertically.
- Subtract 6666 from 8555 horizontally.
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Follow up
- Subtract the greatest 3-digit numbers from the smallest 4-digit number using vertical method of subtraction.
- Ask the students to solve the questions given in the textbook.