Year 4 Addition decimals updates By the end of Year 4 children are now expected to be confident with the use of formal written methods of addition. This, of course, follows on from having good mental skills with adding one and two-digit numbers. We have an excellent collection of addition worksheets and have just updated our resources to include more pages on decimals as well as a better layout. With over 100 pages in total this is a great place to visit. There is plenty of work, both on mental addition and the formal columnar method of written addition. Go to Year 4 Addition