X Tables
Cooking Maths

Maths hiding in cooking: biscuit batches

Calculate how many biscuits come from several trays.

Quick answer

You can calculate how many biscuits you'll have by multiplying the number of trays by the number of biscuits on each tray.

Learning outcome

By the end of this page, you will be able to multiply the number of trays by the number of biscuits on each tray to find the total number of biscuits. Success signs:
  • You can count how many biscuits are on one tray
  • You can count how many trays you have
  • You can multiply these numbers to find the total
  • You can use real-world examples to solve similar problems

Why this matters

Maths in the kitchen helps you plan how much food to make. When you're baking biscuits, you need to know how many you'll get so you can share them fairly with friends and family. This skill helps you with shopping, cooking, and even planning parties. It's also useful when you're helping in the kitchen or making your own recipes.

How it works

To find the total number of biscuits, you need to:
  1. Count how many biscuits are on one tray
  2. Count how many trays you have
  3. Multiply these two numbers together
This is a simple multiplication problem. For example, if you have 6 trays and each tray has 8 biscuits, you multiply 6 × 8 to get 48 biscuits.

Examples you can see

Let's imagine you're helping in the kitchen with your parent or carer. You can see how this works in real life: Example 1: Small batch
  • You have 3 trays
  • Each tray has 4 biscuits
  • How many biscuits in total?
You can draw this:
Tray Biscuits
1 4
2 4
3 4
That's 4 + 4 + 4 = 12 biscuits. Or, 3 × 4 = 12 biscuits. Example 2: Big batch
  • You have 5 trays
  • Each tray has 10 biscuits
  • How many biscuits in total?
You can think of this as 5 groups of 10 biscuits:
  • Group 1: 10 biscuits
  • Group 2: 10 biscuits
  • Group 3: 10 biscuits
  • Group 4: 10 biscuits
  • Group 5: 10 biscuits
That's 10 + 10 + 10 + 10 + 10 = 50 biscuits. Or, 5 × 10 = 50 biscuits.

Try it as a mini adventure

The Great Biscuit Bake Challenge! You are the head baker for a school party. You need to make enough biscuits for 24 children. Each child should get 2 biscuits. You have trays that can hold 6 biscuits each. Step 1: How many biscuits do you need?
  • 24 children × 2 biscuits each = 48 biscuits
Step 2: How many trays do you need?
  • 48 biscuits ÷ 6 biscuits per tray = 8 trays
Step 3: Check your work
  • 8 trays × 6 biscuits = 48 biscuits
This is a fun way to imagine being a real baker planning a party!

Common mistakes

  • Mistake: Counting the trays instead of the biscuits on each tray.
    • Why it happens: You might get confused about what to count.
    • Fix: Remember to count how many biscuits are on one tray, not how many trays there are.
  • Mistake: Adding instead of multiplying.
    • Why it happens: It's easier to add than to multiply, so you might forget to multiply.
    • Fix: If you have 4 trays with 5 biscuits each, think of it as 4 groups of 5. That's 4 × 5 = 20 biscuits.
  • Mistake: Forgetting to check your answer.
    • Why it happens: You might be in a hurry to finish baking.
    • Fix: Always double-check your multiplication by adding the same number of times.

Parent and carer guide

Helping your child with this maths can be easy and fun:
  • Use real trays and biscuits or pretend biscuits if you're not baking.
  • Ask your child to count the biscuits on one tray before multiplying.
  • Let them draw arrays or use objects to show groups.
  • Practice with different numbers of trays and biscuits.
  • Make it a game by timing how fast they can solve a few problems.
  • Don't worry if they make a mistake – it's part of learning!

Practice questions

  1. How many biscuits are there if you have 2 trays with 6 biscuits each?
  2. How many biscuits are there if you have 4 trays with 8 biscuits each?
  3. How many biscuits are there if you have 3 trays with 10 biscuits each?
  4. How many biscuits are there if you have 5 trays with 7 biscuits each?
  5. How many biscuits are there if you have 6 trays with 5 biscuits each?
Answers:
  1. 2 × 6 = 12 biscuits
  2. 4 × 8 = 32 biscuits
  3. 3 × 10 = 30 biscuits
  4. 5 × 7 = 35 biscuits
  5. 6 × 5 = 30 biscuits

FAQ

How can I make this more fun for my child?

Try turning it into a game where you have to bake a certain number of biscuits for a pretend party. You can use toys or food items to act out the trays and biscuits.

What if my child doesn't like maths in the kitchen?

Start with just counting the biscuits on one tray. Then slowly introduce multiplication. You can also try different recipes that involve maths, like making pizza or pancakes.

Can I use this for older children too?

Yes! For older children, you can make problems more complex. For example, if you have 12 trays and each tray holds 12 biscuits, they can calculate 12 × 12 = 144 biscuits.

What other kitchen maths can I practice?

You can also practice measuring ingredients, calculating time, sharing food equally, and even working out how much food you need for a certain number of people.

How do I know if my child understands this concept?

Ask them to explain how they found the answer. If they can show you how they counted or used multiplication, they understand the concept. You can also give them different problems to solve and see if they get the right answers.