One block is needed to make an up-and-down staircase, with one step up and one step down. How many blocks would be needed to build an up-and-down staircase with 5 steps up and 5 steps down?
Are these statements always true, sometimes true or never true?
Explore Alex's number plumber. What questions would you like to ask? What do you think is happening to the numbers?
You cannot choose a selection of ice cream flavours that includes totally what someone has already chosen. Have a go and find all the different ways in which seven children can have ice cream.
Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?