Mathematics - Junior Secondary 1 - Fractions (Continued) – Addition and Subtraction of Fractions

Fractions (Continued) – Addition and Subtraction of Fractions

Get it on Google Play
Get it on the Apple App Store
  1. Home
  2. Comprehensive Lesson Plan and Notes
  3. Junior Secondary 1
  4. Fractions (Continued) – Addition and Subtraction of Fractions

TERM: 1ST TERM

WEEK 7

Class: Junior Secondary School 1
Age: 12 years
Duration: 40 minutes of 5 periods
Subject: Mathematics
Topic: Fractions (Continued) – Addition and Subtraction of Fractions
Focus: Like and Unlike Fractions

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

  1. Define addition and subtraction of fractions.
  2. Add and subtract like fractions.
  3. Add and subtract unlike fractions using LCM.
  4. Simplify answers to the lowest terms.
  5. Apply the concepts to real-life situations.

INSTRUCTIONAL TECHNIQUES:
• Direct teaching
• Guided practice
• Group activities
• Drill and practice
• Real-life application

INSTRUCTIONAL MATERIALS:
• Fraction circles/cards
• Worksheets
• Whiteboard and marker
• Real-life examples (recipes, prices, measurements)

 

PERIOD 1 & 2: Addition and Subtraction of Like Fractions

PRESENTATION:

Step

Teacher’s Activity

Pupil’s Activity

Step 1 – Introduction

Explains what like fractions are (same denominators).

Pupils listen and respond.

Step 2 – Explanation

Shows examples like ½ + ¼, ¾ – ¼ using diagrams.

Pupils participate in solving examples.

Step 3 – Demonstration

Adds and subtracts simple like fractions step-by-step.

Pupils solve exercises with guidance.

Step 4 - Note Taking

Writes clear examples and steps on the board.

Pupils copy notes and ask questions.

NOTE ON BOARD:
• Like fractions: same denominators
• 3/8 + 2/8 = 5/8
• 7/10 – 4/10 = 3/10

EVALUATION (5 exercises):

  1. 1/5 + 2/5
  2. 4/7 – 3/7
  3. 2/9 + 5/9
  4. 6/10 – 1/10
  5. 3/6 + 2/6

CLASSWORK (5 questions):

  1. 1/4 + 3/4
  2. 5/8 – 2/8
  3. 2/3 + 1/3
  4. 7/10 – 5/10
  5. 3/6 + 2/6

ASSIGNMENT (5 tasks):

  1. Solve: 5/7 – 2/7
  2. Add: 1/9 + 3/9
  3. Write 3 examples of like fractions
  4. Solve and simplify: 4/6 + 2/6
  5. Create a word problem involving like fractions

 

PERIOD 3 & 4: Addition and Subtraction of Unlike Fractions

PRESENTATION:

Step

Teacher’s Activity

Pupil’s Activity

Step 1 – Introduction

Recaps like fractions and introduces unlike fractions (different denominators).

Pupils respond to questions.

Step 2 – Explanation

Demonstrates finding LCM of denominators.

Pupils follow and ask questions.

Step 3 – Demonstration

Solves 1/3 + 1/4 by converting to like fractions.

Pupils try examples in pairs.

Step 4 - Note Taking

Summarizes steps for solving unlike fractions.

Pupils copy and practice.

NOTE ON BOARD:
• Unlike fractions: different denominators
• Steps: Find LCM → convert → add/subtract → simplify
• Example: 1/3 + 1/4 = 4/12 + 3/12 = 7/12

EVALUATION (5 exercises):

  1. 1/2 + 1/3
  2. 3/4 – 1/2
  3. 2/5 + 1/10
  4. 5/6 – 1/3
  5. 1/3 + 1/6

CLASSWORK (5 questions):

  1. 2/3 + 1/4
  2. 3/8 – 1/2
  3. 4/5 – 2/3
  4. 1/6 + 5/12
  5. 2/3 + 3/5

ASSIGNMENT (5 tasks):

  1. Solve: 1/3 + 3/5
  2. Write 3 examples of unlike fractions
  3. Explain how to add unlike fractions
  4. Solve and simplify: 2/7 + 3/4
  5. Create a real-life example of unlike fractions

 

PERIOD 5: Real-Life Application

PRESENTATION:

Step

Teacher’s Activity

Pupil’s Activity

Step 1 - Introduction

Gives real-life contexts: recipes, time, prices.

Pupils brainstorm more examples.

Step 2 - Examples

Uses recipe: 1/2 cup + 1/3 cup sugar.

Pupils solve and discuss.

Step 3 - Group Work

Assigns word problems to groups.

Pupils solve and present.

EVALUATION (5 questions):

  1. Tayo walked 3/4 km in the morning and 1/2 km in the evening. Total distance?
  2. If a cake requires 2/3 cup flour and you add 1/3 cup more, how much is that?
  3. Subtract 1/2 hour from 3/4 hour
  4. A bus traveled 2/5 of a route, then 1/10 more. Total?
  5. A tank is 3/4 full. Water used is 1/2. How much left?

CLASSWORK (5 tasks):

  1. Solve 1/2 + 1/3
  2. Write a fraction word problem about food
  3. Create your own example with subtraction
  4. Estimate total time: 1/4 + 2/3 hour
  5. Solve and simplify: 4/5 – 3/10

ASSIGNMENT (5 tasks):

  1. Collect 3 food recipes using fractions
  2. Solve one word problem from the recipe
  3. Draw a pie chart to show fractions
  4. Add and subtract any two fractions from daily life

Create a story involving fractions