Mathematics - Primary 6 - Addition and Subtraction of Numbers

Addition and Subtraction of Numbers

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Term: 1st Term

Week 2

Class: Primary 6
Age: 11 years
Duration: 40 minutes of 5 periods
Date:
Subject: Mathematics
Topic: Addition and Subtraction of Numbers

SPECIFIC OBJECTIVES:

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

  1. Add and subtract any 4 to 10-digit numbers and write the answers in words.
  2. Add and subtract decimal fractions and write answers in words.
  3. Solve real-life problems involving addition and subtraction.
  4. Solve quantitative reasoning problems related to addition, subtraction, and decimals.

INSTRUCTIONAL TECHNIQUES:

  • Explanation and guided examples
  • Interactive discussion
  • Use of number cards and real-life scenarios
  • Drills and practice questions

INSTRUCTIONAL MATERIALS:

  • Number cards
  • Real-life objects (money, distance, etc.)
  • Whiteboard and marker
  • Worksheets
  • Flashcards with decimal numbers

 

PERIOD 1 & 2

PRESENTATION

Step

Teacher’s Activity

Pupil’s Activity

Step 1 – Introduction

Introduces addition of large numbers.

Pupils listen and respond.

Step 2 – Explanation

Demonstrates step-by-step addition of 4–10-digit numbers.

Pupils follow and ask questions.

Step 3 – Demonstration

Uses real-life example (e.g., adding money amounts).

Pupils attempt practice problems.

Step 4 - Note Taking

Pupils write solved examples and rules.

Pupils take notes.

NOTE (On the Board):

  • Add: 24,786,900 + 32,980,111 = 57,767,011
  • Answer in words: Fifty-seven million, seven hundred and sixty-seven thousand and eleven

EVALUATION:

  • Add and write answers in figures and words:
  1. 111,000,000 + 89,000,000
  2. 503,209,210 + 403,123,111

CLASSWORK:

  • Solve 3 addition problems involving 6 to 10-digit numbers.

ASSIGNMENT:

  • Write and solve 3 real-life addition word problems using big numbers.

PERIOD 3 & 4

PRESENTATION

Step

Teacher’s Activity

Pupil’s Activity

Step 1 - Introduction

Recaps addition and moves to subtraction.

Pupils participate.

Step 2 - Explanation

Demonstrates subtraction of 4–10-digit numbers.

Pupils follow along.

Step 3 - Real-life Connection

Subtract amounts in Naira, kilometers, etc.

Pupils solve guided problems.

Step 4 - Note Taking

Pupils copy notes and examples.

Pupils write neatly.

NOTE (On the Board):

  • Subtract: 1,000,000,000 – 786,234,567 = 213,765,433
  • In words: Two hundred and thirteen million, seven hundred and sixty-five thousand, four hundred and thirty-three

EVALUATION:

  • Solve:
    • 500,000,000 – 123,456,789
    • 1,200,000,000 – 975,000,000

CLASSWORK:

  • Solve 3 subtraction problems and write answers in words.

ASSIGNMENT:

  • Write 2 real-life problems involving subtraction of large numbers.

PERIOD 5

PRESENTATION

Step

Teacher’s Activity

Pupil’s Activity

Step 1 - Introduction

Introduces decimal addition and subtraction.

Pupils pay attention.

Step 2 - Explanation

Adds and subtracts decimal fractions with real-life contexts.

Pupils solve decimal examples.

Step 3 - Note Taking

Pupils copy procedures.

Pupils ask questions.

NOTE (On the Board):

  • Add: 12.45 + 6.55 = 19.00
  • Subtract: 30.00 – 12.25 = 17.75
  • In words:
    • Nineteen
    • Seventeen point seven five

EVALUATION:

  • Solve 2 decimal problems and write answers in words.

CLASSWORK:

  • Add and subtract 3 decimal pairs.

ASSIGNMENT:

  • Find and solve 3 real-life decimal problems (e.g., money, fuel, weight).