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Cooking Maths

Maths hiding in cooking: shopping for ingredients

Add prices, compare bargains and work within a small budget.

Quick answer

Maths hiding in cooking: shopping for ingredients means using addition, subtraction, multiplication, and comparison to add up prices, find the best deals, and stay within your budget when buying ingredients for recipes.

Learning outcome

By the end of this page, you will be able to add up prices of ingredients, compare how much different items cost, and work out how much money you have left after shopping. Success signs:
  • You can add up the prices of 3 or more items
  • You can tell which item costs more or less
  • You can work out how much money you have left after buying things
  • You can plan a simple shopping list within a budget

Why this matters

Cooking maths helps you become good at adding up prices, comparing costs, and staying within a budget. These skills are useful when you go shopping, save up for something special, or help plan a family meal. You'll also learn how to check your change and make smart choices about what to buy.

How it works

When you go shopping for cooking ingredients, you need to:
  1. Add up prices to see how much everything costs
  2. Compare prices to find the best deals
  3. Work out how much money you have left after shopping
  4. Plan your shopping so you don’t go over budget

Examples you can see

Let's imagine you are going shopping with your parent or carer to buy ingredients for making a simple pizza. You need to buy:
  • 1 packet of pizza dough – £2.50
  • 200g of mozzarella cheese – £3.00
  • 150g of tomato sauce – £1.20
  • 100g of pepperoni – £2.80
Step 1: Add up the prices
  • £2.50 + £3.00 + £1.20 + £2.80 = £9.50
Step 2: Compare prices You find that mozzarella cheese costs £3.00, but there’s a cheaper brand at £2.75. That’s 25p less! Step 3: Work out how much money you have left If you have £10 to spend, and the ingredients cost £9.50:
  • £10.00 – £9.50 = £0.50
Step 4: Plan your shopping You decide to buy the cheaper cheese and save 25p for a small treat.

Try it as a mini adventure

Adventure: The Great Pizza Shopping Challenge You are planning to make a pizza for your family. Your parent or carer gives you £15 to spend. Here are the ingredients you need:
  • 1 packet of pizza dough – £2.20
  • 200g of mozzarella cheese – £3.20
  • 150g of tomato sauce – £1.50
  • 100g of pepperoni – £2.90
  • 100g of mushrooms – £1.80
  • 1 small onion – £0.50
  1. First time: Add up the prices of all the ingredients. What do they cost in total?
  2. Second time: Compare the price of mozzarella cheese with the cheaper brand at £2.90. How much can you save?
  3. Third time: If you choose the cheaper cheese, how much money do you have left?
  4. Fourth time: You want to buy a small treat with the leftover money. What could you buy for 60p?

Common mistakes

  • Mistake: Forgetting to add the pence when adding prices.
    Why it happens: Children often focus on pounds and forget the smaller amounts.
    Fix: Always write prices with a decimal point like £2.50 and add them carefully, column by column.
  • Mistake: Thinking that £2.50 is more than £2.75.
    Why it happens: Confusion about how decimals work.
    Fix: Use a number line or visualise the amounts to compare them properly.
  • Mistake: Not checking how much money you have left.
    Why it happens: Rushing through the shopping or not thinking ahead.
    Fix: Always subtract the total from your budget to see how much is left.
  • Mistake: Choosing the most expensive item to save money on others.
    Why it happens: Not thinking about the whole shopping list.
    Fix: Look at all items and compare prices before buying.

Parent and carer guide

Helping your child with cooking maths is easy and fun! Here are 5 simple ways to support them:
  1. Start with simple prices like £1.20, £2.50, and £3.00 to make addition easier.
  2. Use real money or play with coins and notes to practice adding up.
  3. Ask questions like, "How much more does this cost than that?" or "Can we afford to buy both?"
  4. Let them choose which items to buy or how to spend their budget to build decision-making skills.
  5. Turn it into a game by setting a challenge like, "Can you find the cheapest tomato sauce?"
If your child gets stuck, remind them to:
  • Write down the prices neatly
  • Add the pounds first, then the pence
  • Use a calculator if needed, but check if the answer makes sense

Practice questions

  1. What is the total cost of 1 bag of flour (£1.20) and 1 packet of yeast (£0.80)?
  2. Which costs more: £2.50 or £2.30?
  3. If you have £5 and spend £3.75, how much money do you have left?
  4. How much would 3 packets of cheese at £1.50 each cost?
  5. You have £10. You spend £6.25. How much is left?
Answers:
  1. £2.00
  2. £2.50
  3. £1.25
  4. £4.50
  5. £3.75

FAQ

How can I help my child with shopping maths at home?

You can practice by asking them to add up the prices of items in your shopping trolley, compare prices of similar products, or work out how much change you should get from £10.

What are some real-life examples of cooking maths?

When you cook, you might need to double a recipe, measure ingredients, or work out how many servings you can make from a pack of ingredients. All of these use maths!

Why is it important to learn cooking maths?

Learning cooking maths helps you become good at money maths, problem-solving, and planning. These skills are useful for life, not just in the kitchen!

How can I make shopping maths fun?

Turn shopping into a game by setting challenges like "Find the cheapest item", "Can you add up the prices without using a calculator?", or "Which item is the most expensive?"

What if my child gets confused with decimal numbers?

Use visual aids like coins, number lines, or drawings to show how £2.50 is two pounds and fifty pence. Practice with everyday items to make it easier to understand.