Lesson Notes By Weeks and Term v5 - Grade 4
Whole numbers: place value and operations (Grade 4) – Week 3 focus
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Whole numbers: place value and operations (Grade 4) – Week 3 focus
Download the Lessonotes Mobile South Africa app for faster lesson access on Android and iPhone.
Subject: Mathematics
Class: Grade 4
Term: 1st Term
Week: 3
Theme: General lesson support
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This week, we're focusing on building a strong understanding of whole numbers, their place value, and how to perform basic operations (addition, subtraction) with them. This is crucial because numbers are everywhere in our daily lives in South Africa. Think about going to the local spaza shop to buy bread and sweets, counting the number of learners in your class, or even understanding the prices of things your family needs. Being comfortable with whole numbers helps us make smart choices and solve problems every day. We're expanding on what you learned in Grade 3 to work with bigger numbers!
This week, we're focusing on building a strong understanding of whole numbers, their place value, and how to perform basic operations (addition, subtraction) with them. This is crucial because numbers are everywhere in our daily lives in South Africa. Think about going to the local spaza shop to buy bread and sweets, counting the number of learners in your class, or even understanding the prices of things your family needs. Being comfortable with whole numbers helps us make smart choices and solve problems every day. We're expanding on what you learned in Grade 3 to work with bigger numbers! By the end of this week, you will be able to: Objective 1: Read, write, and identify the place value of digits in whole numbers up to at least 4 digits (thousands). (CAPS: Number, Operations and Relationships)
Objective 2: Compare and order whole numbers up to at least 4 digits, using symbols > (greater than), (Greater Than):** The open side of the symbol points to the larger number.
Example: 2 500 > 1 800 ** 2 345).
Commentary: This question tests the ability to compare numbers, addressing Objective
2. Start by comparing the thousands digits, they are equal. Compare the hundreds digits, they are equal. Compare the tens digit, 5 is greater than 4, so 2 354 is greater than 2
3
4
5. Question 3: Add 2 456 and 1
3
2
1. Solution: ``` 2 456 + 1 321 ------- 3 777 ```
Commentary: This question provides practice with addition, addressing Objective
3. It uses column addition which helps with organization and reduces errors.
Question 4: Subtract 1 234 from 3
5
7
8. Solution: ``` 3 578 1 234 ------- 2 344 ```
Commentary: This question provides practice with subtraction, addressing Objective
4. Question 5: Sipho has 1 525 marbles, and Zandi has 1 212 marbles. How many marbles do they have in total?
Solution: 1 525 + 1 212 = 2
7
3
7. They have 2 737 marbles in total.
Commentary: This is a word problem that applies addition in a real-world context, addressing Objective
5. It encourages learners to translate the problem into a mathematical equation. Independent Practice (Questions Only) Write the number 6 083 in expanded form. What is the value of the digit 5 in the number 1 592?
Which is smaller: 4 678 or 4 687? Use the correct symbol. Arrange the following numbers in ascending order: 2 100, 1 999, 2 010, 2
1
0
1. Calculate: 3 642 + 2
2
3
5. Calculate: 5 876 - 2
4
3
1. A farmer has 2 345 sheep and buys another 1 123 sheep. How many sheep does the farmer have now? Thandi has saved R4
5
0
0. She spends R1 250 on new shoes. How much money does Thandi have left? What number is 100 less than 6 789? What number is 1000 more than 3 456? Real-life Applications / Integration Spaza Shop Calculations: Imagine you are helping at a local spaza shop. You need to add up the prices of items customers are buying (e.g., bread, milk, sweets) and give them the correct change. Understanding addition and subtraction of whole numbers is essential for this. Also, comparing prices of similar items to find the best deal utilizes the 'comparing numbers' concept.
Counting Learners in School: A principal needs to keep track of the number of learners in each grade at a school. They use whole numbers to count the learners and compare the numbers between different grades. This is crucial for planning resources and allocating classrooms.
Managing a Tuckshop: Learners who run a tuckshop need to be able to add up the money they make each day, subtract the costs of the items they sell, and calculate their profits. This requires a strong understanding of addition and subtraction. Differentiation, Remediation and Extension Remediation (Struggling Learners): Use concrete materials like base-ten blocks or counters to represent numbers and perform operations. This helps visualize the concept of place value and makes addition and subtraction more tangible. Provide one-on-one support to learners who are struggling with specific concepts. Break down the steps into smaller, more manageable chunks. Focus on mastering one skill at a time (e.g., addition without carrying before moving on to addition with carrying). Use number lines to help learners visualize addition and subtraction. Pair struggling learners with peer tutors who can provide support and encouragement.
Extension (High-Achieving Learners): Challenge learners with more complex word problems that involve multiple steps or require them to apply their knowledge in creative ways.
For instance: "A shopkeeper has 3 boxes of chocolates. Each box has 125 chocolates. He sells 210 chocolates. How many chocolates are left?". Introduce larger numbers (e.g., numbers up to 10 000 or even beyond). Encourage learners to explore different calculation strategies, such as mental math or estimation. Ask them to explain why these strategies work. Have learners create their own word problems and share them with the class. Introduce the concept of rounding numbers to the nearest ten, hundred, or thousand. Explore number patterns and sequences.