Submarine maths quest: money

Quick answer

You can use maths to plan your budget when going on a submarine adventure, by counting coins, adding prices, and working out how much money you need for tickets, food, and souvenirs.

Learning outcome

By the end of this page, you will be able to add up prices of items, count different coins, and work out how much money you need for a fun submarine trip.

• You can add up the cost of 3 different submarine shop items
• You can count how many coins you need for a given amount
• You can decide if you have enough money for your submarine adventure
• You can work out how much change you would get from a given amount

Why this matters

Money maths helps you know how much things cost, how to pay for them, and how to save up. When you go on a submarine adventure, you'll need to plan how much money to bring, and how to spend it wisely. This is a real-life skill you use every day!

How it works

When you go on a submarine trip, you need to know how much money to take. Here's how to work it out:

1. Look at what you want to buy
2. Add up the prices
3. Count your coins
4. Check if you have enough money
5. If you have extra, work out how much change you'll get

Let's imagine you're planning a submarine adventure. You'll need to budget for tickets, snacks, and souvenirs.

Examples you can see

Imagine you're planning a submarine trip. Here's how to use money maths:

Example 1: Ticket prices

You need to buy tickets for you and your friend:

• Adult ticket costs 8 coins
• Child ticket costs 5 coins

How much do you need to pay?

8 + 5 = 13 coins

Example 2: Shop items

In the submarine shop, you see these items:

• Seaweed lollipop costs 3 coins
• Plastic fish toy costs 6 coins
• Submarine keychain costs 4 coins

How much do they cost all together?

3 + 6 + 4 = 13 coins

Example 3: Change

You have 20 coins and you buy a submarine toy that costs 12 coins.

How much change do you get?

20 - 12 = 8 coins

Try it as a mini adventure

Let's go on a Submarine Maths Quest: Money adventure!

You are planning a submarine trip with your family. You need to budget for:

• 2 adult tickets (8 coins each)
• 3 child tickets (5 coins each)
• 1 submarine snack (4 coins)
• 2 souvenirs (3 coins each)

4th time: How much money do you need to take?

5th time: If you have 50 coins, how much change will you get?

Step-by-step challenge

1st time: Work out the cost of adult tickets

2nd time: Work out the cost of child tickets

3rd time: Add the snack and souvenir costs

4th time: Add all costs together

5th time: Subtract your total from 50 coins

Common mistakes

• Mistake: Adding 10 + 5 and getting 15 instead of 15
• Why it happens: Confusing addition with subtraction
• Fix: Double-check your addition by counting up from the larger number

• Mistake: Thinking 12 coins are more than 10 coins
• Why it happens: Not understanding place value
• Fix: Use coins to count and compare amounts

• Mistake: Forgetting to add up all items
• Why it happens: Getting distracted or rushing
• Fix: Write down each item and its price

Parent and carer guide

Help your child practice money maths with these simple tips:

• Play a game where you buy items and count coins together
• Ask your child to add up prices of items in a shop
• Use real coins to make different amounts
• Practice with small amounts first, then build up
• Encourage your child to explain how they worked out the answer

Remember: It's okay to make mistakes. That's how we learn!

Practice questions

1. How much is 5 + 7?
2. You have 12 coins. You spend 8 coins. How much do you have left?
3. What is 9 + 6?
4. You buy a toy for 4 coins and a snack for 3 coins. How much did you spend?
5. How much change would you get from 15 coins if you spend 9 coins?

• Answer 1: 12
• Answer 2: 4
• Answer 3: 15
• Answer 4: 7
• Answer 5: 6

FAQ

How do I know if I have enough money?

Add up all the prices of the things you want to buy. If your total is less than or equal to the money you have, you have enough.

What if I don't have enough money?

You can choose to buy fewer items, or save up more money before your trip.

Why is it important to count money?

Counting money helps you make smart choices about what to buy, and makes sure you don't spend too much.

How can I practice money maths at home?

Use real coins or play money to add up prices, make change, and budget for small purchases.

Can I use maths to plan a trip?

Yes! You can use addition, subtraction, and counting to plan how much money you need for your trip.