Mathematics - Primary 5 - Addition and subtraction of fractions

Addition and subtraction of fractions

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Term: 1st Term

Week 8: Addition and Subtraction of Fractions

Class: Primary 5
Age: 10 years
Duration: 40 minutes of 5 periods
Date:
Subject: Mathematics
Topic: Addition and Subtraction of Fractions

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

  1. Add and subtract fractions with common denominators.
  2. Add and subtract proper fractions, improper fractions, and mixed fractions.
  3. Solve real-life problems involving addition and subtraction of fractions.
  4. Use the LCM method to add and subtract fractions.

INSTRUCTIONAL TECHNIQUES:

  • Lecture and demonstration
  • Pair work and individual practice
  • Real-life problem-solving

INSTRUCTIONAL MATERIALS:

  • Fraction strips or fraction charts
  • Whiteboard and markers

INSTRUCTIONAL PROCEDURES:

PERIOD 1-2:

Step

Teacher’s Activity

Pupil’s Activity

STEP 1 - INTRODUCTION

Recap how to add and subtract fractions with common denominators.

Pupils recall the previous lesson and engage in discussion.

STEP 2 - EXPLANATION

Demonstrates adding and subtracting fractions with common denominators (e.g., 1/4 + 2/4 = 3/4).

Pupils follow the demonstration and practice with examples.

STEP 3 - PRACTICE EXERCISES

Provide exercises involving adding and subtracting fractions with common denominators.

Pupils solve problems individually and pair up to discuss solutions.

EXERCISE:

  • 3/8 + 5/8 = ?
  • 7/10 - 3/10 = ?

 

PERIOD 3-5:

Step

Teacher’s Activity

Pupil’s Activity

STEP 1 - ADDING AND SUBTRACTING MIXED FRACTIONS

Explain how to add and subtract mixed fractions (e.g., 1 1/2 + 2 1/4).

Pupils listen and practice the steps.

STEP 2 - USE OF LCM METHOD

Explain how to add and subtract fractions with unlike denominators using the LCM method.

Pupils follow along and apply the LCM method in practice problems.

STEP 3 - REAL-LIFE APPLICATION

Provide real-life examples of adding and subtracting fractions (e.g., sharing pizza).

Pupils practice solving real-life fraction problems.

EXERCISE:

  • 2 3/4 + 1 1/2

5 1/4 - 2 3/4