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Subject: Mathematics
Semester: 1
Period: 1
Week: 3
School Name:
Teacher’s Name:
Subject: Mathematics
Grade Level: Grade 4
Date: Week 3
Lesson Duration: 45 minutes
Week & Period: Week 3, Period 1
Topic: Rounding Whole Numbers
Sub-topic: To the Nearest Thousand
Learning Objectives
By the end of the lesson, students should be able to:
Round whole numbers to the nearest thousand
Apply rounding in real-life situations
Previous Knowledge
Students already know place value of digits up to hundred thousand
Instructional Materials
Mathematics textbook for Grade 4, flashcards, number charts
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Teacher writes 4,376 on the board and asks students: If you had about 4,376 people at a stadium, what is the nearest thousand?
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
Definition:
Rounding is the process of making a number simpler or easier to work with by expressing it near its closest 10, 100, 1,000, 10,000, or 100,000.
The rounded number is not exact, but it is close to the original number and useful for estimation.
Why Round Numbers?
- To make numbers easier to understand, communicate, or calculate
- Used in everyday life when exact numbers are unnecessary, such as:
- Estimating population
- Calculating distances
- Budgeting and shopping
- Predicting sales or profits
Rounding Rule (Nearest Thousand):
- Identify the digit in the thousands place.
- Look at the digit to the immediate right (hundreds place):
- If it is 5 or greater, round up the thousands place by 1 and change all digits to the right to 0
- If it is less than 5, keep the thousands place the same and change all digits to the right to 0
Examples (with Step-by-Step Explanation):
Example 1: Round 4,376 to the nearest 1,000
- Thousands place = 4
- Hundreds place = 3 (less than 5)
→ Keep 4 and change remaining digits to 0
Answer: 4,000
Example 2: Round 7,582 to the nearest 1,000
- Thousands place = 7
- Hundreds place = 5 (5 or more)
→ Add 1 to 7 = 8, change rest to 0
Answer: 8,000
Example 3: Round 56,324 to the nearest 1,000
- Thousands place = 6
- Hundreds place = 3
→ Round down
Answer: 56,000
Example 4: Round 82,750 to the nearest 1,000
- Thousands place = 2
- Hundreds place = 7
→ Round up
Answer: 83,000
Example 5: Round 109,499 to the nearest 1,000
- Thousands place = 9, hundreds = 4
→ Round down
Answer: 109,000
Example 6: Round 109,501 to the nearest 1,000
- Thousands = 9, hundreds = 5
→ Round up: 9 + 1 = 10 (carry over to ten thousands)
→ Answer: 110,000
Learners’ Activities (Expanded):
- Flashcard Practice (Individual):
- Each student receives flashcards with 5-digit numbers.
- They round each to the nearest 1,000 on their own.
- Example flashcards: 12,346 → 12,000 | 78,555 → 79,000
- Rounding Relay (Team Game):
- Teacher divides class into 3 groups.
- Each group is given 10 numbers.
- Each member takes turns to round a number to the nearest 1,000 and write the result on the board.
- Fastest and most accurate team wins.
- Real-Life Application – Population Data Rounding (Group Activity):
- Teacher gives actual or fictional population figures (e.g., Kakata: 23,497, Zorzor: 12,672).
- Students round each to the nearest 1,000.
- Group explains why rounding might be useful for reporting population.
- “Round and Run” Game (Physical Activity):
- Four corners of the classroom are labeled:
1,000
B. 10,000
C. 100,000
D. Stay Still - Teacher calls out numbers, e.g., “Round 67,234 to the nearest 1,000!”
- Students run to the corner labeled 1,000, then shout out the answer (67,000)
- Great for kinesthetic learners
- Four corners of the classroom are labeled:
- Think-Pair-Share:
- Each student rounds 3 numbers.
- Then they swap answers with a partner and check each other’s work.
- If answers differ, discuss why.
Assessment Checks:
Teacher Oral Check:
- “Round 56,324 to the nearest 1,000.” → 56,000
- “Round 82,750 to the nearest 1,000.” → 83,000
- “Round 99,499 to the nearest 1,000.” → 99,000
Written Assessment (5 items):
- Round 24,721 → __________
- Round 77,321 → __________
- Round 109,834 → __________
- Round 100,499 → __________
- Round 89,999 → __________
Answers:
- 25,000
- 77,000
- 110,000
- 100,000
- 90,000
Bonus Question:
Explain why rounding is helpful when planning a school event for 12,379 students.
Notes (Expanded & Detailed):
- Rounding makes numbers easier to estimate, compare, or calculate quickly—especially helpful in budgeting, data analysis, and measurement.
- Rounding does not give the exact value but a close approximation.
- It is essential to always identify the correct place value and then apply the rounding rule by checking the digit to the immediate right.
Homework/Extended Practice:
Instructions: Round each number to the nearest 1,000.
- 32,738 → ______________
- 45,299 → ______________
- 71,601 → ______________
- 89,995 → ______________
- 12,501 → ______________
- 100,000 → ______________
- 109,999 → ______________
- 23,450 → ______________
- 67,590 → ______________
- 98,760 → ______________
Bonus:
- Why would a mayor round population numbers when addressing the public?
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: Students explain rules of rounding. Teacher highlights importance of estimation in real life.
Evaluation Method (Expanded):
Exit slip/quiz: Round 99,276 to the nearest 1,000.
Assignment (Expanded):
Find the populations of three towns in your textbook or newspaper and round each to the nearest thousand.
Follow-up Activity:
Students estimate number of items at home (e.g., grains of rice, number of people in a gathering) and round to nearest thousand.
Differentiation / Inclusive Strategies
Weaker learners use number charts for visual aid. Stronger learners practice rounding to the nearest 10,000.
Teacher’s Reflection (After Class)
What worked well? ___________________________________________
What needs improvement? ____________________________________
Students’ engagement level: ☑ High ☑ Medium ☑ Low