This chapter explains multiplication as repeated addition and shows how it helps calculate totals in equal groups. Students learn about the parts of multiplication — multiplicand, multiplier, and product — and understand that multiplication follows the commutative property (order does not change the product).
Important properties like the zero property and easy methods for multiplying by 10, 100, and 1000 are introduced. The chapter also teaches smart strategies such as doubling and halving, using the nearest multiple method, and solving problems through the expanded form method.
Through real-life dairy farm examples like calculating milk and fodder quantities, students see how multiplication is used in daily life.
Overall, this chapter builds strong multiplication skills using practical methods and real-world applications.
Key Points
• Multiplication as Repeated Addition – Helps compute total when we have equal groups (e.g., 7 × 6 = 42 butter packets)
• Factors, Multiplicand & Multiplier – The numbers multiplied are factors; the multiplicand is the number being multiplied, the multiplier is the number it’s multiplied by, and the result is the product
• Commutative Property – Swapping the numbers doesn’t change the product (e.g., 7 × 6 = 6 × 7 = 42)
• Zero Property of Multiplication – Any number multiplied by zero equals zero (both ways)
• Multiplying by 10, 100, 1000 – Just add zeros: one for ×10, two for ×100, three for ×1000
• Doubling & Halving Strategy – Halve one number and double the other to make multiplication easier (e.g., 3 × 18 = 6 × 9 = 54)
• Nearest Multiple Method – Use nearby round numbers to simplify multiplication and adjust (e.g., 4 × 19 ≈ 4 × 20 – 4 = 76)
• Expanded Form Method – Break numbers into tens, hundreds, etc., multiply each part, then add results (e.g., 268 × 4 = 800 + 240 + 32 = 1,072)
• Real-Life Examples –
Cows’ milk: 29 cows × 5 litres = 145 litres; 297 cows × 18 kg fodder = 5,346 kg
👉 👉 This chapter gives us multiple tools to multiply smarter—not harder! From handy tricks to breaking numbers down, these strategies make math flexible, fun, and linked to real life—like managing a dairy farm.