Our number system uses powers of 10 to express large numbers concisely. These problems have been chosen to help you develop a better understanding of this place value system.

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

How many solutions can you find to this sum? Each of the different letters stands for a different number.

Use the differences to find the solution to this Sudoku.

Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...

Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?

Powers of numbers behave in surprising ways. Take a look at some of these and try to explain why they are true.

A collection of short problems to test your understanding of place value.