Mathematics - Primary 4 - Multiplication and Division of Decimals

Multiplication and Division of Decimals

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Term: 2nd Term

Week: 4

Class: Primary 4
Age: 9 years
Duration: 40 minutes of 5 periods
Date:
Subject: Mathematics
Topic: Multiplication and Division of Decimals

SPECIFIC OBJECTIVES:

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

  1. ) Multiply decimals by a 1-digit number.
  2. ) Divide decimals by a 1-digit number.
  3. ) Discover how to multiply decimals by 10, 100, and 1000.
  4. ) Use numbers greater than 10 to multiply and divide decimals.

INSTRUCTIONAL TECHNIQUES: Explanation, class discussion, demonstration.
INSTRUCTIONAL MATERIALS: Decimal charts, textbooks, flashcards.

INSTRUCTIONAL PROCEDURES

PERIOD 1 and 2:

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1 – INTRODUCTION

Introduces the multiplication of decimals by a 1-digit number.

Pupils listen and follow along.

STEP 2 – EXPLANATION

Explains how to multiply a decimal by a 1-digit number (e.g., 0.5 x 3 = 1.5).

Pupils follow the examples.

STEP 3 – DEMONSTRATION

Demonstrates multiplying decimals by a 1-digit number.

Pupils solve examples with the teacher.

STEP 4 – NOTE TAKING

Pupils write down the steps for multiplying decimals by 1-digit numbers.

Pupils take notes in their notebooks.

NOTE:

  • Multiply the numbers as if they are whole numbers, then count the decimal places.
  • Example:
    0.5 x 3 = 1.5

EVALUATION:

  1. 6 x 4 = ?
  2. 25 x 2 = ?
  3. 5 x 3 = ?

CLASSWORK:

  1. Multiply 0.75 by 2.
  2. Multiply 0.5 by 5.
  3. Multiply 2.25 by 3.

ASSIGNMENT:

  1. Multiply 1.2 by 6.
  2. Multiply 0.4 by 8.

PERIOD 3 and 4:

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1 – INTRODUCTION

Introduces the division of decimals by a 1-digit number.

Pupils listen and ask questions.

STEP 2 – EXPLANATION

Explains the steps to divide decimals by a 1-digit number (e.g., 1.5 ÷ 3 = 0.5).

Pupils observe and take notes.

STEP 3 – DEMONSTRATION

Demonstrates dividing decimals by a 1-digit number.

Pupils follow and solve with the teacher.

STEP 4 – NOTE TAKING

Pupils write down the steps for dividing decimals by a 1-digit number.

Pupils take notes in their notebooks

NOTE:

  • Divide the numbers as if they are whole numbers, then adjust the decimal point accordingly.
  • Example:
    1.5 ÷ 3 = 0.5

EVALUATION:

  1. 2 ÷ 4 = ?
  2. 5 ÷ 5 = ?
  3. 6 ÷ 2 = ?

CLASSWORK:

  1. Divide 2.4 by 3.
  2. Divide 1.5 by 5.
  3. Divide 3.6 by 6.

ASSIGNMENT:

  1. Divide 4.5 by 9.
  2. Divide 7.2 by 8.

 

PERIOD 5:

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1 – INTRODUCTION

Introduces multiplying decimals by 10, 100, and 1000.

Pupils listen attentively.

STEP 2 – EXPLANATION

Demonstrates multiplying decimals by powers of 10 (e.g., 0.5 x 10 = 5).

Pupils observe and take notes.

STEP 3 – DEMONSTRATION

Demonstrates multiplying decimals by 100, 1000.

Pupils follow and practice multiplying with powers of 10.

STEP 4 – NOTE TAKING

Pupils write down the steps for multiplying decimals by powers of 10.

Pupils take notes.

NOTE:

  • When multiplying a decimal by 10, shift the decimal point one place to the right.
  • Example:
    0.5 x 10 = 5
    0.25 x 100 = 25

EVALUATION:

  1. 6 x 100 = ?
  2. 25 x 10 = ?
  3. 45 x 1000 = ?

CLASSWORK:

  1. Multiply 0.75 by 100.
  2. Multiply 1.5 by 10.
  3. Multiply 0.25 by 1000.

ASSIGNMENT:

  1. Multiply 0.4 by 1000.
  2. Multiply 2.5 by 100.