All of the numbers to make a complete addition are given by the resource. The player needs to switch the tiles around to make it correct. The tiles in the question and answer parts can, and will need to be, interchanged. The numbers and positions are totally random meaning that sometimes the resource will offer a greater challenge than at other times. While the answer is incorrect the cross will remain on screen, when it is correct a tick will replace it. A score is given so that teachers can utilise the resource as a worksheet requiring to see, for example, a score of 5.
Go to column addition arranger resource.
For a similar (much harder) challenge but using multiplication see this teaching resource.