X Tables
Hidden Multiplication

Multiplication hiding in swimming lengths

Pool length multiplied by laps gives total distance.

Quick answer

Multiplication hiding in swimming lengths means using multiplication to work out how far you swim when you do a certain number of laps in a pool. If a pool is 25 metres long and you swim 10 laps, you swim 25 × 10 = 250 metres. Simple multiplication helps you find the total distance.

Learning outcome

By the end of this page, you will be able to use multiplication to find the total distance swum when you know the pool length and number of laps. Success signs:
  • You can multiply pool length by number of laps to get total distance
  • You can draw a picture to show how many laps you swam
  • You can use real-life swimming to practice your multiplication
  • You can explain how multiplication helps you find distance

Why this matters

Multiplication helps you find how far you swim without having to count every metre. It’s useful for swimming lessons, races, and training. It’s also helpful when you're planning how many laps to do for a good workout. Understanding this helps you become a better swimmer and a more confident mathematician.

How it works

Multiplication is about equal groups. If you swim 10 laps in a 25-metre pool, you have 10 groups of 25 metres. You can add 25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 to get the total, or multiply 10 × 25 = 250 metres. Step-by-step:
  1. Find the length of the pool (in metres)
  2. Find how many laps you swam
  3. Multiply the pool length by the number of laps
  4. You now know how far you swam

Examples you can see

Let’s look at some swimming examples to help you understand. Example 1: A pool is 25 metres long. You swim 4 laps.
  • Each lap = 25 metres
  • 4 laps = 4 × 25 = 100 metres
Example 2: A pool is 50 metres long. You swim 6 laps.
  • Each lap = 50 metres
  • 6 laps = 6 × 50 = 300 metres
Example 3: A pool is 10 metres long. You swim 12 laps.
  • Each lap = 10 metres
  • 12 laps = 12 × 10 = 120 metres
You can also use a table to show this:
Pool Length (metres) Laps Total Distance (metres)
25 4 100
50 6 300
10 12 120

Try it as a mini adventure

Adventure: The Pool Marathon Challenge You are a swimmer preparing for a big pool challenge. Your pool is 25 metres long. You want to swim a total of 1000 metres. How many laps do you need to swim? Let’s solve this step by step:
  1. Pool length = 25 metres
  2. Total distance = 1000 metres
  3. How many laps? 1000 ÷ 25 = 40 laps
Mini Challenge: You have a pool that is 10 metres long. You want to swim 300 metres. How many laps do you need to swim? Answer: 300 ÷ 10 = 30 laps Real-Life Swim Story: Sarah loves swimming. Her pool is 20 metres long. She swims 8 laps every day. How far does she swim each day?
  1. Pool length = 20 metres
  2. Laps = 8
  3. Total = 8 × 20 = 160 metres
Sarah swims 160 metres every day. That’s a great workout!

Common mistakes

  • Mistake: Thinking that 10 laps in a 25-metre pool is 10 + 25 = 35 metres.
    Why it happens: Adding instead of multiplying.
    Fix: Remember that 10 laps = 10 groups of 25 metres. Multiply 10 × 25 = 250 metres.
  • Mistake: Forgetting to include the pool length in the multiplication.
    Why it happens: Not reading the problem carefully.
    Fix: Always check that you have the pool length and number of laps before multiplying.
  • Mistake: Using 100 instead of 10 for laps.
    Why it happens: Confusing the numbers or writing them down wrong.
    Fix: Double-check the number of laps and pool length before calculating.

Parent and carer guide

As a parent or carer, you can help your child by:
  • Using a real pool or a drawing of a pool to show how laps work
  • Practising multiplication using the pool length and number of laps
  • Encouraging your child to draw a picture of the laps
  • Using swimming as a fun way to practice maths
  • Letting your child plan how many laps they want to swim for a certain distance
You can also say:
  • "Let’s see how far you swim if you do 5 laps in a 20-metre pool."
  • "How many metres do you think you swim if you do 12 laps?"
  • "Let’s write it out like a multiplication sum."
Don’t worry if your child makes mistakes. It’s normal to get confused at first. The key is to keep practising and to make it fun!

Practice questions

  1. A pool is 25 metres long. You swim 6 laps. How far do you swim?
  2. A pool is 10 metres long. You swim 15 laps. How far do you swim?
  3. A pool is 50 metres long. You swim 4 laps. How far do you swim?
  4. A pool is 20 metres long. You swim 10 laps. How far do you swim?
  5. A pool is 15 metres long. You swim 8 laps. How far do you swim?
Answers:
  1. 6 × 25 = 150 metres
  2. 15 × 10 = 150 metres
  3. 4 × 50 = 200 metres
  4. 10 × 20 = 200 metres
  5. 8 × 15 = 120 metres

FAQ

How do I know how far I swim?

First, find the length of your pool in metres. Then, count how many laps you swim. Multiply the pool length by the number of laps to get your total distance.

Can I use this for any pool?

Yes! As long as you know the pool length and how many laps you did, you can always multiply to find your distance.

What if I don’t know how many laps I did?

If you know your pool length and how far you swam, you can divide the total distance by the pool length to find the number of laps.

Is this just for swimming?

No! This kind of multiplication is used in many places like running, cycling, walking, and even planning a trip around a park or a block.

Can I use this to plan my swim training?

Yes! You can plan how many laps you want to do to swim a certain distance, like 500 metres or 1000 metres.