Build the number
A number with 6 thousands, 2 hundreds, 4 tens and 8 ones is 6,248.
Build the number from its parts.
Year 4
Solve number and practical problems involving these ideas
Use counting, place value, comparing and rounding to solve one-step and two-step number problems.
Lesson overview
Number - number and place value
Place value helps us choose efficient ways to solve problems. Instead of starting again each time, we can use what we know about thousands, hundreds, tens and ones.
Choose the greater number
Between 4,908 and 4,890, the greater number is 4,908.
The tens are equal, so compare the ones.
Round to estimate
4,372 is about 4,400 to the nearest 100.
A rounded number can help us judge if an answer is sensible.
Worked example
A library has 3,482 books. About how many books is that to the nearest 100?
- Find the nearest hundreds around the number.
- 3,482 lies between 3,400 and 3,500.
- It is closer to 3,500.
- So the library has about 3,500 books.
Round 1: Learn it
Pick out the place-value idea in the problem before solving.
Finish this round to unlock Round 2: Show you know it.
Question 1
Which number has 5 thousands, 4 hundreds, 2 tens and 1 one?
Question 2
A hall has 4,165 seats. Another hall has 4,156 seats. Which hall has more?
Question 3
Round 7,251 to the nearest 100.
Question 4
What number is 1000 more than 3,450?
Question 5
Which statement is correct?
Common mistakes
Watch for these as you work through the lesson.
- Ignoring the place-value clue in the question.
- Comparing the wrong digit first.
- Rounding to the wrong place.
Related topics
These ideas connect closely to this lesson.
- Recognise the place value of each digit in a four-digit number.
- Round any number to the nearest 10, 100 or 1000.