Lesson Notes By Weeks and Term v5 - Grade 3

Lesson Video

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Performance objectives

• Break down any three-digit number into Hundreds, Tens, and Units.
• Read and write numbers up to 999 in symbols and words.
• Compare and order numbers using <, >, and =.
• Add and subtract three-digit numbers using the break-down method.
• Solve simple word problems.

Lesson summary

This week, we dive deeper into the world of three-digit numbers, extending our understanding up to

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9. This is a crucial step in a learner's mathematical journey, as it forms the foundation for all future work with larger numbers, multiplication, division, and fractions. In our daily lives in South Africa, we encounter three-digit numbers constantly: when we look at the price of groceries in Rands (e.g., R125), measure distances between our towns and cities in kilometres, or see the number of pages in a thick storybook. By mastering how to build, break down, compare, and calculate with these numbers, learners gain confidence and essential skills for navigating the world around them.

Lesson notes

This week, we dive deeper into the world of three-digit numbers, extending our understanding up to

9

9

9. This is a crucial step in a learner's mathematical journey, as it forms the foundation for all future work with larger numbers, multiplication, division, and fractions. In our daily lives in South Africa, we encounter three-digit numbers constantly: when we look at the price of groceries in Rands (e.g., R125), measure distances between our towns and cities in kilometres, or see the number of pages in a thick storybook. By mastering how to build, break down, compare, and calculate with these numbers, learners gain confidence and essential skills for navigating the world around them. Learning Objectives By the end of this week's lessons, learners will be able to: Decompose any three-digit number into Hundreds, Tens, and Units (e.g., 628 = 600 + 20 + 8). Read and write any number between 0 and 999 in both number symbols (digits) and number names (words). Compare and order whole numbers up to 999 using the correct symbols: greater than (>), less than ( (greater than), and = (equal to). A helpful tip is to imagine the symbol is a crocodile's mouth – it always wants to eat the bigger number!

How to Compare: Look at the Hundreds digit first. The number with the bigger Hundreds digit is the bigger number. If the Hundreds are the same, look at the Tens digit. The number with the bigger Tens digit is bigger. If the Hundreds and Tens are the same, look at the Units digit. The number with the bigger Units digit is bigger.

Worked Example 2: Compare 745 and

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4. Step 1: Compare the Hundreds. Both numbers have a 7 in the Hundreds place. They are the same.

Step 2: Compare the Tens. The first number has a 4 (value 40). The second number has a 5 (value 50). Since 5 is bigger than 4, the second number is bigger.

Step 3: Write the answer using the correct symbol. *745 , or =) in the circle: 509 O 590 Solution 2: Step 1: Compare Hundreds: Both numbers have a 5 in the Hundreds place (500). They are equal.

Step 2: Compare Tens: The first number has a 0 in the Tens place (0). The second number has a 9 in the Tens place (90).

Step 3: Conclusion: Since 0 is less than 9, the first number is smaller.

Answer: 509 ** , or =. a) 345 ___ 354 b) 980 ___ 890 c) 112 ___ 100 + 10 + 2 Order these numbers from smallest to biggest: 717, 177, 771, 707 Solve using the break-down method for addition: a) 521 + 368 = b) 405 + 293 = Solve using the break-down method for subtraction: a) 987 - 542 = b) 659 - 150 = Sipho has saved R

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0. His gogo gives him R200 more for his birthday. How much money does Sipho have in total? There are 875 learners at Protea Primary School. If 320 learners are boys, how many are girls? What is the biggest number you can make using the digits 2, 9, and 5? What is the smallest number? Real-life Applications / Integration Shopping at a Spaza Shop: Learners can create a shopping list with prices (e.g., Bread R18, Milk R25, Sugar R42, etc.). They can then practice adding up the total cost of two or three items, ensuring the total stays under a budget like R100 or R

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0. This integrates Financial Literacy. For example, if you have R250, can you buy a soccer ball for R120 and a t-shirt for R115? (120 + 115 =

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5. Yes, you can!)

Tracking Provincial COVID-19 Numbers: Use simplified, rounded daily statistics from a province (e.g., Gauteng had 450 new cases, Western Cape had 310). Learners can compare which province has more cases (450 > 310). They can add the two numbers to find a combined total. This links mathematics to Social Sciences and real-world health awareness.

Reading and Distances: Learners can look at the page numbers in their favourite books. If you are on page 112 of a 350-page book, how many pages are left to read? (350 - 112). They can also look at a road map of South Africa and find the distances between cities, comparing them to see which journey is longer. Differentiation, Remediation and Extension Remediation (For Struggling Learners)

Concrete Aids: Use Dienes blocks (flats for 100s, longs for 10s, units for 1s) or Flard cards to physically build and break down numbers. This tactile experience helps solidify the concept of place value.

Simplify the Range: Work with numbers up to 200 first before moving to

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9. Ensure they are confident with two-digit numbers before adding the third digit.

Number Lines: Use a large, open number line on the floor or whiteboard to practice addition and subtraction by jumping in 100s, then 10s, then 1s.

Scaffolded Worksheets: Provide worksheets where the steps for the break-down method are already laid out, and learners just have to fill in the blanks. Extension (For High-Achieving Learners)

Introduce Regrouping: Teach addition with 'carrying' and subtraction with 'borrowing' using the same decomposition methods. For example, 458 +

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4. Problem Creation: Challenge learners to create their own word problems based on South African scenarios.