Add and remove hundreds, tens and ones blocks to build a number, and see it written in digits, in expanded form and in words. Ten ones can be swapped for a ten, and ten tens for a hundred.
Place value is the foundation for adding and subtracting with bigger numbers, so it is worth getting really comfortable with it.
How to use it
- Use + and − to add or remove hundreds, tens and ones.
- Watch the number, expanded form and words update.
- Add a one when there are 9 ones to see ten ones regroup into a ten.
Skills practised
For Grades 1–3.
- Place value of hundreds, tens and ones
- Expanded form
- Reading and writing numbers to 999 in words
Frequently asked questions
What is place value?
Place value is the value of a digit because of its position. In 347 the 3 is worth 300, the 4 is worth 40 and the 7 is worth 7.
What does regrouping mean?
Swapping ten of one unit for one of the next, for example ten ones for one ten. It is the idea behind carrying and borrowing.