In maths we do a quick warm up at the start of our lesson. This involves learning how to do something or practicing something we have already learned so that we don't forget how to do it. In this lesson we were learning to split numbers by making (bridging) 10 before adding on the rest. This is so that we can solve problems more easily and quickly.
In these photos Blessing and Kingston demonstrate how to do this perfectly. See if you can follow what they did: