Scratch balloon popping maths mission

Quick answer

You can use a Scratch balloon popping game to practise subtraction by popping balloons with numbers on them and working out how many are left after some are popped.

Learning outcome

By the end of this page, you will be able to solve subtraction problems by popping balloons and counting how many are left.

• You can subtract numbers up to 20
• You can solve word problems using subtraction
• You can use a Scratch game to practise subtraction
• You can create your own balloon popping subtraction challenges

Why this matters

Subtraction is one of the most useful maths skills you'll learn. It helps you figure out how many things you have left when some are taken away. When you play games like popping balloons, you're practising subtraction in a fun way that's easy to understand.

Subtraction is used in many everyday situations, like:

• Sharing your snacks with friends
• Counting how many toys you still have after giving some away
• Working out how much time is left before your next activity
• Calculating how much money you have left after buying something

When you play a Scratch game to pop balloons, you're learning subtraction while having fun. This makes it easier to remember and use in real life.

How it works

Let's think about how a Scratch balloon popping game works:

1. First, you see a group of balloons with numbers on them
2. Then, some balloons pop (or are taken away)
3. You count how many are left to find the answer

This is subtraction in action! If you start with 8 balloons and 3 pop, you count: 8, 7, 6, 5. So, 8 minus 3 equals 5.

Here's how to do it step by step:

1. Look at the first number (the big number)
2. Count backwards by how many are taken away
3. Stop counting when you've gone back the right number of times
4. That number is your answer

Examples you can see

Let's imagine you're playing a Scratch game with balloons:

Example 1: You see 10 balloons. 4 balloons pop. How many are left?

• Start with 10
• Count backwards 4 times: 9, 8, 7, 6
• So, 10 minus 4 equals 6

Example 2: You have 15 balloons. 7 balloons pop. How many are left?

• Start with 15
• Count backwards 7 times: 14, 13, 12, 11, 10, 9, 8
• So, 15 minus 7 equals 8

Example 3: You see 20 balloons. 12 balloons pop. How many are left?

• Start with 20
• Count backwards 12 times: 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8
• So, 20 minus 12 equals 8

Try it as a mini adventure

Let's go on a balloon popping adventure!

Imagine you're in a magical balloon shop. You have 12 balloons to start with. Each time you pop a balloon, you get a prize. But you need to figure out how many balloons you have left after each pop.

Adventure Step 1: You start with 12 balloons

Adventure Step 2: You pop 3 balloons

Adventure Step 3: How many balloons do you have left?

Adventure Step 4: You pop 5 more balloons

Adventure Step 5: How many balloons do you have left now?

Adventure Step 6: You pop 2 more balloons

Adventure Step 7: How many balloons do you have left?

Can you solve this balloon adventure? Try counting backwards each time!

Common mistakes

• Mistake: Counting forwards instead of backwards when subtracting
• Why it happens: It's easier to count forwards, so children sometimes forget to go backwards
• Fix: Practice counting backwards from the big number. Try saying the numbers out loud as you go backwards

• Mistake: Forgetting to start counting from the big number
• Why it happens: Children might start counting from 1 instead of the number they're subtracting from
• Fix: Always start with the bigger number and count backwards by the smaller number

• Mistake: Counting too many or too few times
• Why it happens: It's easy to get confused about how many times to count backwards
• Fix: Use your fingers or objects to help count. Put your fingers up for the number you're subtracting, then count backwards once for each finger

Parent and carer guide

Helping your child with subtraction can be fun and easy! Here are 5 minutes of simple support:

1. Ask questions: "How many do you have now?" or "What happens if we take 3 away?"
2. Use real objects: Count out 10 counters or toys, then take away some and count how many are left
3. Count backwards together: Practice counting backwards from 10, 15, or 20
4. Make it fun: Create your own balloon popping game with paper balloons and a toy or your fingers
5. Be patient: It's normal for children to make mistakes. Use them as learning opportunities

What to watch for:

• Does your child count forwards instead of backwards?
• Do they get confused about which number to start counting from?
• Are they counting the right number of times?

What not to worry about:

• They might not get the right answer first time
• They might need to count with their fingers
• They might need extra practice with certain numbers

Practice questions

Try these subtraction problems:

1. 10 - 3 = ?
2. 15 - 6 = ?
3. 18 - 9 = ?
4. 12 - 4 = ?
5. 20 - 7 = ?

Answers:

1. 10 - 3 = 7
2. 15 - 6 = 9
3. 18 - 9 = 9
4. 12 - 4 = 8
5. 20 - 7 = 13

FAQ

What is subtraction?

Subtraction is taking away some of the things you have. It's like having 10 cookies and eating 3 of them. You have 7 left.

Why do we use Scratch for subtraction?

Scratch games make learning subtraction fun and visual. You can see the balloons pop and count how many are left, which helps you understand the concept better.

How can I practice subtraction at home?

You can use everyday objects like toys, snacks, or blocks. Take some away and count how many are left. This is subtraction!

What if I find subtraction hard?

That's okay! Everyone learns at their own pace. Use your fingers, count backwards, or use objects to help you. Practice makes progress!

Can I make my own Scratch balloon game?

Yes! You can create your own Scratch game with balloons. You can add numbers, make them pop, and create your own subtraction challenges.