Ahh exchanging: 'Don't forget to carry.. erm.. exchange the one/ten/hundred'. It's a skill that some children just actively dislike but it's a very important one. So we've created this Year 4 Add Two 4-Digit Numbers - More than One Exchange activity to give children the opportunity to put the skill into the context of a game. It can be played in class or as part of an intervention group. There is a list of required resources and a set of instructions to help with ease of set up!