Today children are continuing to focus on making numbers in different ways. However, today children are to look at making a targeted number using addition and subtraction methods. For example 17 can be made as 20-3 or 10 + 7. Children are looking to make the target number of 13. There is a worksheet to structure this however feel free to add additional ideas.
Extension: choose a number (this could be above 20!) and find some ways of making this number.