8.5.5 Addition and Subtraction to 20, Using 5 and 10: This is maybe quite a simple activity but children could also make the sum on their rack and work out the answer. They could also think of other examples to fill up the boxes.
This freebie is a sample of my Double Bubble: Doubles and Doubles +1 Unit. It includes 2 activity sheets. Download these cute worksheets at: https://www.teacherspayteachers.com/Product/Doubles-and-Doubles-Plus-1-FREEBIE-732590