Revision Mathematics Primary 3 Week 11 First Term Plan Lesson Notes

Subject: Mathematics

Class: Primary 3

Term: First Term

Week: 11

Topic: Revision (Addition and Subtraction of Decimal, Writing Arabic Numerals in Roman Numerals, and Addition and Subtraction of Whole Numbers in Story Problems)

Sub-topic: –

Duration: 45 minutes

Entry Behaviour: Students are expected to have prior knowledge of basic addition and subtraction concepts, understanding of decimal numbers, and familiarity with Arabic numerals.

Key Words:

• Decimal
• Addition
• Subtraction
• Arabic Numerals
• Roman Numerals
• Whole Numbers
• Story Problems

Behavioural Objectives: By the end of the lesson, students should be able to:

1. Demonstrate proficiency in adding and subtracting decimals.
2. Convert Arabic numerals to Roman numerals.
3. Solve story problems involving addition and subtraction of whole numbers.

Embedded Core Skills:

• Numerical Reasoning
• Problem Solving
• Critical Thinking

Learning Materials:

1. Whiteboard and markers
2. Decimal cards
3. Arabic and Roman numeral charts
4. Story problem worksheets
5. Class textbooks

Content:

1. Introduction (5 minutes):
   • Recap of previous lessons.
   • Overview of today’s topics.
2. Presentation (15 minutes):
   • Explanation and practice of adding and subtracting decimals.
   • Interactive session on converting Arabic numerals to Roman numerals.
   • Introduction of story problems involving whole numbers.
3. Step 1 (10 minutes):
   • Teacher demonstrates addition and subtraction of decimals on the whiteboard.
   • Class engages in guided practice with decimal cards.
4. Step 2 (10 minutes):
   • Teacher introduces Arabic and Roman numeral charts.
   • Students practice converting selected Arabic numerals to Roman numerals.
5. Step 3 (10 minutes):
   • Teacher presents story problems involving whole numbers.
   • Students work in pairs to solve story problems

Worked Examples:

1. Adding and Subtracting Decimals:

Example 1: 2.34+1.27=3.612.34+1.27=3.61
Example 2: 5.68−2.45=3.235.68−2.45=3.23
Example 3: 7.91+4.72=12.637.91+4.72=12.63
Example 4: 6.25−1.48=4.776.25−1.48=4.77
Example 5: 9.36+2.89=12.259.36+2.89=12.25
2. Convert Arabic Numerals to Roman Numerals:

Example 1: ArabicNumeral=25

RomanNumeral=XXV

Example 2: ArabicNumeral=49

RomanNumeral=XLIX

Example 3: ArabicNumeral=43

RomanNumeral=LXIII

3. Solve Story Problems Involving Whole Numbers:

• Example 1: Problem: Mary had 15 candies. She bought 8 more. How many candies does she have now? Solution: $15+8=23$ Answer: Mary has 23 candies.
• Example 2: Problem: There were 50 students in the class. 12 students joined later. How many students are there now? Solution: $50+12=62$ Answer: There are 62 students in the class.
• Example 3: Problem: Tom saved 30 dollars. He spent 15 dollars. How much money does he have left? Solution: $30-15=15$ Answer: Tom has 15 dollars left.
• Example 4: Problem: A store had 120 books. If 25 were sold, how many books are left? Solution: $120-25=95$ Answer: There are 95 books left in the store.
• Example 5: Problem: John had 48 marbles. He gave 20 to his friend. How many marbles does John have now? Solution: $48-20=28$ Answer: John has 28 marbles

**Fill-in-the-Blank Questions:**

1. The result of adding 3.25 and 2.78 is ______.
– a) 6.03
– b) 5.97
– c) 6.53
– d) 5.22

2. If \(87.64 – 42.18 = \underline{\hspace{1cm}}\), what is the correct answer?
– a) 45.46
– b) 49.82
– c) 38.46
– d) 55.64

3. Convert the Arabic numeral 56 to Roman numerals: ______.
– a) LVI
– b) XLVI
– c) LX
– d) XVI

4. In the story problem “A garden had 75 roses. If 28 were picked, how many roses are left?” the correct answer is ______.
– a) 47
– b) 53
– c) 28
– d) 75

5. \(5.12 + 7.89 = \underline{\hspace{1cm}}\).
– a) 12.01
– b) 13.01
– c) 12.51
– d) 13.21

6. The Roman numeral representation of 40 is ______.
– a) XXX
– b) XL
– c) LX
– d) XX

7. Solve the story problem: “If there were 60 balloons and 25 were blown away, how many balloons are left?” The correct answer is ______.
– a) 35
– b) 45
– c) 25
– d) 60

8. \(9.75 – 3.68 = \underline{\hspace{1cm}}\).
– a) 6.07
– b) 5.07
– c) 7.07
– d) 5.67

9. Convert the Arabic numeral 84 to Roman numerals: ______.
– a) LXXIV
– b) XCIV
– c) LXXXIV
– d) XIV

10. If \(42.56 + 18.34 = \underline{\hspace{1cm}}\), what is the correct sum?
– a) 60.90
– b) 60.80
– c) 61.90
– d) 59.80

11. The result of \(125 – 87 = \underline{\hspace{1cm}}\).
– a) 37
– b) 38
– c) 48
– d) 47

12. Convert the Arabic numeral 72 to Roman numerals: ______.
– a) LXXII
– b) XXVII
– c) LXII
– d) LXXVII

13. In the story problem “There were 90 apples. If 35 were eaten, how many apples are left?” the correct answer is ______.
– a) 55
– b) 65
– c) 35
– d) 90

14. \(6.48 + 4.75 = \underline{\hspace{1cm}}\).
– a) 11.23
– b) 10.23
– c) 11.43
– d) 10.53

15. The Roman numeral representation of 100 is ______.
– a) C
– b) L
– c) D
– d) M

Teacher’s Activities:

• Facilitate class discussions.
• Provide explanations and examples.
• Monitor individual and group activities.

Learners’ Activities:

• Engage in guided and independent practice.
• Participate in discussions.
• Solve problems individually and collaboratively.

Assessment:

• Continuous observation of students’ participation and understanding.
• Written assessment on adding and subtracting decimals.
• Roman numeral conversion exercise.
• Story problem solving assessment

Questions:

1. What is the process of adding decimals?
2. How do you subtract decimals?
3. Can you convert the Arabic numeral 50 to Roman numerals?
4. Solve the story problem: “If John had 15 apples and gave away 7, how many does he have left?”
5. Perform the subtraction: 89 – 24.
6. Convert the Roman numeral XV to Arabic numerals.
7. Explain the steps involved in subtracting whole numbers in story problems.
8. What is the value of 0.6 + 0.3?
9. Solve the story problem: “A store had 120 candies. If 30 were sold, how many candies are left?”
10. Demonstrate how to add 3.5 and 2.75.

Conclusion on the Topic:

• Recap key concepts covered in the lesson.
• Reinforce the importance of understanding decimal operations and problem-solving skills.
• Highlight the practical applications of converting numerals and solving real-world story problems