Dinosaur maths quest: place value

Quick answer

Place value helps us understand what each digit in a number means based on its position – like how the digit 5 in 53 means 5 tens, not just 5 ones.

Learning outcome

By the end of this page, you will be able to break down big numbers into hundreds, tens, and ones, just like a dinosaur detective!

• You can identify the value of each digit in a number
• You can build numbers using hundreds, tens, and ones
• You can compare numbers using place value
• You can use place value to solve simple addition problems

Why this matters

Place value is like a secret code that helps you understand big numbers. When you learn place value, you can:

• Read and write large numbers
• Count dinosaurs in a fossil dig
• Measure how tall a T-Rex was
• Plan how many rocks to collect for your dinosaur museum
• Understand how many years ago a dinosaur lived

It’s like having a superpower to decode numbers!

How it works

Place value means each digit in a number has a different value depending on where it stands:

1. Ones place – the rightmost digit
2. Tens place – the second digit from the right
3. Hundreds place – the third digit from the right

For example, in the number 347:

• The 7 is in the ones place – that’s 7 ones
• The 4 is in the tens place – that’s 4 tens, or 40
• The 3 is in the hundreds place – that’s 3 hundreds, or 300

Examples you can see

Imagine you're a dinosaur detective and you find these clues:

Clue 1: Fossil Counts

You found 234 fossils. Let’s break them down:

So 234 = 200 + 30 + 4

Clue 2: Dinosaur Timeline

Scientists say the Triceratops lived 68 million years ago. Let’s break this down:

So 68 million = 600 million + 80 million + 0 million

Clue 3: Dinosaur Footprints

You counted 100 footprints in a row. That’s 1 hundred, 0 tens, 0 ones.

100 = 100 + 0 + 0

Try it as a mini adventure

Let’s go on a Dinosaur Maths Quest! You are a detective who must find the secret number of dinosaur bones in a cave. Here’s your adventure:

Step 1: Find the Fossils

You see 3 boxes of bones. Each box has 100 bones. That’s 300 bones total.

Step 2: Count the Tiny Bones

There are 5 boxes with 10 tiny bones each. That’s 50 tiny bones.

Step 3: Count the Smallest Bones

There are 7 single tiny bones. That’s 7 bones.

Step 4: Add Them Up

Now, add all the bones together:

• 300 bones (from boxes)
• 50 bones (from tiny boxes)
• 7 bones (single bones)

300 + 50 + 7 = 357 bones

Step 5: Break Down the Number

What does 357 mean?

• 3 hundreds = 300
• 5 tens = 50
• 7>

So, 357 = 300 + 50 + 7

Common mistakes

• Mistake: Thinking 53 means 5 ones and 3 tens.
  Why it happens: The order of digits can be confusing.
  Fix: Remember, the rightmost digit is ones, then tens, then hundreds.
• Mistake: Writing 100 as 10 tens.
  Why it happens: Mixing up the place values.
  Fix: 100 = 1 hundred, not 10 tens. 10 tens = 100.
• Mistake: Counting backwards when writing numbers.
  Why it happens: Not knowing the order of place values.
  Fix: Always start from the left (hundreds), then tens, then ones.

Parent and carer guide

Helping your child with place value can be fun and easy:

1. Use real objects: Count out 300 blocks, 50 small blocks, and 7 single blocks to show 357.
2. Play a game: Ask your child to build a number using base-10 blocks or coins.
3. Use everyday numbers: Talk about the number of steps, pages in a book, or items in a grocery list.
4. Be patient: It’s normal to make mistakes – they help us learn!
5. Ask questions: “What does the 4 mean in 47?” or “How many hundreds are in 532?”

Practice questions

1. What is the value of the digit 6 in 642?
2. Break down the number 285 into hundreds, tens, and ones.
3. Which number has 4 hundreds, 3 tens, and 7 ones?
4. Write 500 + 40 + 9 as a number.
5. Compare 321 and 312. Which is bigger?

Answers:

1. 600 (6 hundreds)
2. 200 + 80 + 5
3. 437
4. 549
5. 321 is bigger

FAQ

What is place value?

Place value means the value of each digit in a number depends on where it is. The rightmost digit is ones, then tens, then hundreds.

Why do we need place value?

It helps us read, write, and understand big numbers. Without it, we wouldn’t know if 23 means 23 ones or 2 tens and 3 ones.

How can I practice place value at home?

You can use base-10 blocks, coins, or even draw groups of hundreds, tens, and ones. Try breaking down your age or the number of steps you take.

What comes after hundreds in place value?

After hundreds come thousands, then ten thousands, then hundred thousands, and so on.

Can I use place value with big numbers?

Yes! Place value works for any number, even 1,000,000 or more. Each digit still has a place value.