By Year 6 children are expected to know the square of numbers up to at least 10. This page provides some revision of this together with some extension work on finding square numbers of multiples of 10. Care needs to be taken when finding these. For example, because 50 is 5 x 10, the square of 50 can be broken down into 5 x 5 x 10 x 10 which makes 250 x10 which is 2 500. Keep an eye out for some children who think it is just 250.
This page can be found in our Year 6, Knowing number facts section. It is also a useful page for the year 6 planning: Block B, Unit 3, week 2 for those teacher viewers.