Mathematics - Primary 5 - Number line

Number line

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Term: 2nd Term

Week 1: Number Line

Class: Primary 5
Age: 10 years
Duration: 40 minutes of 5 periods
Subject: Mathematics
Topic: Number Line

SPECIFIC OBJECTIVES:
At the end of the lesson, pupils should be able to:

  1. Add and subtract integers using the number line.
  2. Solve quantitative aptitude problems related to addition and subtraction of integers using number lines.

 

PERIOD 1:

Time

Activity

Methodology

Learning Aids

0-10 min

Introduction to the concept of a number line.

Explanation, Questioning

Chalkboard, Diagram of Number Line

10-20 min

Demonstration of addition and subtraction using number line.

Teacher-led demonstration, Guided Practice

Number line on the board, Chalk

20-30 min

Practice problems on the number line.

Independent practice, Peer discussion

Worksheets with problems, Chalkboard

30-40 min

Review and feedback on practice problems.

Review, Correction of mistakes

Chalkboard

NOTE ON THE BOARD:

  • A number line is a straight line where numbers are arranged at equal intervals.
  • To add, move to the right.
  • To subtract, move to the left.

EVALUATION:

  1. Solve: 3 + 5 = ?
  2. Solve: 6 - 4 = ?
  3. Solve: -3 + 7 = ?
  4. What does moving to the right on the number line represent?
  5. What does moving to the left on the number line represent?

CLASSWORK:

  1. Add: -2 + 6 = ?
  2. Subtract: 8 - 3 = ?
  3. Add: 4 + (-5) = ?
  4. Subtract: -4 - 2 = ?
  5. Find: 3 + (-6) = ?

ASSIGNMENT:

  1. Solve: 5 + (-3) = ?
  2. Solve: -7 - 2 = ?
  3. Add: -12 + 8 = ?
  4. Subtract: 6 - 9 = ?
  5. What does the movement to the left represent?

CONCLUSION:

  • Recap the concept of using the number line for addition and subtraction.
  • Emphasize the importance of moving to the right for addition and to the left for subtraction.
  • Remind students to practice using the number line for future math problems.

PERIOD 2-3:

Time

Activity

Methodology

Learning Aids

0-10 min

Review previous period’s lesson and practice problems.

Review, Questioning

Chalkboard, Number line diagram

10-20 min

Demonstration of more addition and subtraction using number line.

Teacher-led demonstration, Guided practice

Number line, Chalk

20-30 min

Group practice with peer support.

Group activity, Peer teaching

Worksheets, Chalkboard

30-40 min

Quick feedback on group activity and corrections.

Class discussion, Teacher feedback

Chalkboard

NOTE ON THE BOARD:

  • A number line helps visualize addition and subtraction of integers.
  • Addition moves to the right on the number line, while subtraction moves to the left.
  • In problems with negative numbers, the direction still applies: right for addition and left for subtraction.

EVALUATION:

  1. Solve: -3 + 5 = ?
  2. Solve: 7 - 8 = ?
  3. Find: -6 + 4 = ?
  4. What happens when you add a negative number on the number line?
  5. What happens when you subtract a larger number from a smaller number?

CLASSWORK:

  1. Add: 6 + (-4) = ?
  2. Subtract: 9 - 12 = ?
  3. Find: -8 + 6 = ?
  4. Subtract: 7 - 15 = ?
  5. Add: -2 + 9 = ?

ASSIGNMENT:

  1. Solve: -5 + 7 = ?
  2. Subtract: 10 - 14 = ?
  3. Find: -4 + 9 = ?
  4. Add: -3 + 12 = ?
  5. What does moving left on the number line represent?

CONCLUSION:

  • Reinforce how the number line is used to simplify adding and subtracting integers.
  • Encourage students to use the number line for practice and problem-solving in future lessons.
  • Remind them of the importance of knowing the movement for addition and subtraction on the number line.

PERIOD 4-5:

Time

Activity

Methodology

Learning Aids

0-10 min

Introduction to estimation using number line.

Explanation, Guided practice

Chalkboard, Number line

10-20 min

Demonstration of estimation using rounding.

Teacher-led demonstration, Group practice

Number line, Chalk

20-30 min

Students practice estimating sums, differences, and products.

Independent practice

Worksheets, Chalkboard

30-40 min

Review and feedback on estimation exercises.

Class discussion, Teacher feedback

Chalkboard

NOTE ON THE BOARD:

  • Quantitative aptitude problems can be solved using the number line for easier visualization.
  • Practice solving more complex problems involving both positive and negative integers.

EVALUATION:

  1. Solve: 5 + (-3) = ?
  2. Solve: -7 + 9 = ?
  3. Subtract: 12 - 16 = ?
  4. What is the result of -5 + 4 on a number line?
  5. Explain the movement when adding a negative number.

CLASSWORK:

  1. Add: -4 + 5 = ?
  2. Subtract: 15 - 11 = ?
  3. Find: -9 + 8 = ?
  4. Subtract: 6 - 12 = ?
  5. Add: 7 + (-5) = ?

ASSIGNMENT:

  1. Solve: 4 + (-9) = ?
  2. Find: -2 + 6 = ?
  3. Subtract: 10 - 13 = ?
  4. Add: -7 + 3 = ?
  5. What happens when you subtract a smaller number from a larger number?

CONCLUSION:

  • Summarize how the number line was used to solve more advanced problems.
  • Emphasize the importance of understanding negative numbers in relation to the number line.

Encourage pupils to continue practicing with different numbers for better understanding.