X Tables
Hidden Multiplication

Multiplication hiding in rowing strokes

Strokes per minute multiplied by minutes estimates total strokes.

Quick answer

Multiplication is hiding in rowing strokes because you can find the total number of strokes by multiplying strokes per minute by the number of minutes you row.

Learning outcome

By the end of this page, you will be able to multiply strokes per minute by minutes to find the total number of strokes you row. Success signs:
  • You can count how many strokes you take in one minute
  • You can multiply that number by how long you row
  • You can find the total number of strokes without counting each one
  • You can use multiplication to estimate your rowing

Why this matters

Multiplication helps rowers know how many strokes they’ve taken without counting each one. It's like a secret code that makes rowing easier to track. When you row in a boat, you take many strokes, and multiplying helps you know how many in total. This maths helps rowers know how far they’ve gone, how long they've been rowing, and how hard they've worked. It's also helpful for coaches to plan training and for rowers to improve their performance.

How it works

Multiplication in rowing is simple:
  1. Count how many strokes you take in one minute
  2. Decide how long you row (in minutes)
  3. Multiply those two numbers together
Let's imagine you row for 5 minutes, and you take 12 strokes each minute. That's 12 × 5 = 60 strokes in total.

Examples you can see

Let's look at some rowing examples that use multiplication. Example 1: You row for 3 minutes, and you take 10 strokes per minute.
  • Strokes per minute = 10
  • Minutes rowed = 3
  • Total strokes = 10 × 3 = 30
Example 2: You row for 6 minutes, and you take 8 strokes per minute.
  • Strokes per minute = 8
  • Minutes rowed = 6
  • Total strokes = 8 × 6 = 48
Example 3: You row for 10 minutes, and you take 15 strokes per minute.
  • Strokes per minute = 15
  • Minutes rowed = 10
  • Total strokes = 15 × 10 = 150
You can also draw a picture to show this. Imagine 3 rows of 10 dots. That’s 3 × 10 = 30 dots. This is like 3 minutes with 10 strokes each.

Try it as a mini adventure

Rowing Adventure: The Race Across the Lake You are going on a rowing adventure across a lake. You have a special boat with a rowing log that shows how many strokes you take each minute. Step 1: You row for 2 minutes and take 12 strokes per minute.
  • How many strokes in total? 12 × 2 = 24 strokes
Step 2: You row for 4 minutes and take 10 strokes per minute.
  • How many strokes in total? 10 × 4 = 40 strokes
Step 3: You row for 5 minutes and take 14 strokes per minute.
  • How many strokes in total? 14 × 5 = 70 strokes
Step 4: You row for 7 minutes and take 8 strokes per minute.
  • How many strokes in total? 8 × 7 = 56 strokes
Step 5: You row for 3 minutes and take 20 strokes per minute.
  • How many strokes in total? 20 × 3 = 60 strokes
Final challenge: Add up all your strokes to see how many you rowed in total.
  • 24 + 40 + 70 + 56 + 60 = 250 strokes
You rowed 250 strokes in total! That’s a great adventure!

Common mistakes

  • Mistake: Forgetting to multiply strokes per minute by minutes.
    Why it happens: You might only count the strokes in one minute and forget to multiply by the time.
    Fix: Always remember to multiply the number of strokes by how many minutes you rowed.
  • Mistake: Mixing up strokes per minute and minutes.
    Why it happens: It's easy to confuse which number is which.
    Fix: Draw a quick sketch showing strokes per minute and minutes, then multiply them.
  • Mistake: Not using a simple method to multiply.
    Why it happens: Some children might count each stroke instead of multiplying.
    Fix: Use repeated addition or skip counting to help with multiplication.

Parent and carer guide

Parents and carers can help by:
  • Encouraging children to count their own strokes for 1 minute
  • Using a timer to show how long they row
  • Practising multiplication with real rowing examples
  • Letting children draw or act out the multiplication
  • Using a rowing log or a notebook to track strokes
What to say:
  • "Let's count how many strokes you take in one minute"
  • "How many minutes did you row?"
  • "Now let's multiply to find the total strokes"
  • "You did a great job using multiplication!"
What not to worry about:
  • Children might make mistakes at first – that’s normal
  • They don’t need to row for long to practice
  • It's okay if they use counting instead of multiplication at first

Practice questions

  1. You row for 4 minutes and take 12 strokes per minute. How many strokes in total?
  2. You row for 6 minutes and take 10 strokes per minute. How many strokes in total?
  3. You row for 3 minutes and take 15 strokes per minute. How many strokes in total?
  4. You row for 5 minutes and take 8 strokes per minute. How many strokes in total?
  5. You row for 7 minutes and take 11 strokes per minute. How many strokes in total?
Answers:
  1. 12 × 4 = 48 strokes
  2. 10 × 6 = 60 strokes
  3. 15 × 3 = 45 strokes
  4. 8 × 5 = 40 strokes
  5. 11 × 7 = 77 strokes

FAQ

What is multiplication?

Multiplication is a way to add the same number many times quickly. For example, 3 × 4 means 3 groups of 4, which is 4 + 4 + 4 = 12.

How can I use multiplication in rowing?

You can use multiplication to find how many strokes you take in total. If you row for 5 minutes and take 10 strokes each minute, you multiply 10 × 5 = 50 strokes.

Why is it helpful to multiply strokes per minute?

Multiplying helps you know how many strokes you've taken without counting each one. It's faster and helps you track your rowing.

Can I use this with other sports?

Yes! You can use multiplication in swimming (strokes per lap × laps), running (steps per minute × minutes), or even dancing (moves per beat × beats).

What if I don’t know my times tables?

You can still multiply by adding the same number again and again. For example, 6 × 4 is the same as 6 + 6 + 6 + 6 = 24. You can also use drawings or objects to help.