Five children were playing when they were joined by four more children. How many children are there in total?
We know there were five children playing. And they were joined by four more children. We need to work out how many children there are in total. That means we need to add together five children and four more. What is five plus four? Five and four more. One, two, three, four takes us to nine. Five children were playing. They were joined by four more children. There are nine children in total.