Multiplication Patterns, Coins, and Algorithms
Year 3 Mathematics Exploring patterns through multiplication Learning with coins and step-by-step instructions
What is Multiplication?
Multiplication is repeated addition 3 × 5 means 5 + 5 + 5 Making equal groups Creating arrays (rows and columns)
Calculator Pattern Hunt
Use calculators to add 5 repeatedly: 5, 10, 15, 20... Try adding 10 repeatedly: 10, 20, 30, 40... What patterns do you notice? Look at the last digit of each number
Discovering Coin Patterns
5 cent coins: 5, 10, 15, 20, 25, 30... 10 cent coins: 10, 20, 30, 40, 50, 60... Numbers ending in 0 or 5 are multiples of 5 Numbers ending in 0 are multiples of 10
What is an Algorithm?
An algorithm is a set of step-by-step instructions to solve a problem Like a recipe for cooking or directions to a place In maths, we use algorithms to sort, count, and find patterns
Coin Sorting Algorithm
Step 1: Pick up a coin Step 2: Look at the coin carefully Step 3: Is it 5 cents? Put it in the 5c group Step 4: Is it 10 cents? Put it in the 10c group Step 5: Repeat until all coins are sorted
Creating Arrays and Patterns
{"left":"Draw 4 rows of 5 dots\nThis shows 4 × 5 = 20\nUse grid paper to make neat arrays","right":"Count by 5s: 5, 10, 15, 20\nArrays help us see multiplication\nPatterns make counting easier"}
What Did We Learn Today?
Multiplication is repeated addition We can find patterns by skip counting Algorithms are step-by-step instructions Arrays help us visualize multiplication Coins help us practice with 5s and 10s