Money Maths: Choosing the Right Operation
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Money Maths: Choosing the Right Operation
Year 3-4 Learning to solve money problems with addition, subtraction and multiplication
WALT - We Are Learning To
Identify which operation (+ - ×) to use in money problems Solve calculations with dollars and cents Explain our reasoning for choosing operations Use multiplication in money problems (extension) Check if our answers make sense
Australian Curriculum Alignment
Mathematical modelling in financial contexts Relationships between dollars and cents Addition and subtraction as inverse operations Multiplication facts and mental strategies Interpreting and communicating solutions
Success Criteria - I Can...
Read and understand money word problems Decide if I need to add, subtract, or multiply Explain why I chose that operation Solve problems with dollars and cents accurately Attempt extension multiplication problems Check my answers for reasonableness
Resources for Learning
Play money (coins and notes) Word problem worksheets Calculators (optional) Bar models and diagrams Number sentence recording sheets Dyslexia-friendly materials
Introduction: Money Operations Detective
Money is counted in dollars ($) and cents (¢) Addition combines amounts together Subtraction finds the difference or change Multiplication is repeated addition We need to read problems carefully to choose the right operation
Guided Practice: Solve Together
Problem 1: Emma has $15. She buys lunch for $8. How much is left? Problem 2: Jake finds $3.50 in one pocket and $2.25 in another. Total money? Problem 3: A toy costs $12.95. Sarah pays with $20. What's her change? Let's identify the operation and solve step by step!
Independent Activity: Money Problem Solving
Work individually or in pairs Solve 8 money word problems For each problem: identify the operation, explain your choice, write a number sentence, solve accurately Use play money or drawings if helpful Extension problems include multiplication
Class Discussion: Share Your Thinking
How did you decide which operation to use? What clues in the problem helped you? Did anyone solve the problem differently? Does your answer make sense? How can you check?
Plenary & Extension Challenge
Extension Problem: Chocolate bars cost $2.50 each. How much for 4 bars? Why is multiplication better than addition here? Optional: Use calculators for checking Reflection: What operation clues did you learn today? Next lesson: We'll explore more complex money problems