This worksheet is designed to help children improve their addition and subtraction skills. It features a large number of problems for children to solve, but with a twist - not all of the answers provided are correct. This exercise challenges children to carefully check the facts and identify and fix the incorrect answers. By completing this exercise, children can develop a deeper understanding of fundamental math concepts and improve their problem-solving skills. This exercise is an engaging way to promote student engagement and prepare children for more advanced math concepts in the future.