Give the kids plenty of practice with number bonds to 10, relating them to simple addition sums at the same time.
Adding with Number Bonds to 10
This set of 4 worksheets using number bonds for addition is the first to introduce the concept that both 4 + 5 and 5 + 4 make 9.
Count the pictures, fill in the numbers in our number bond model and then write the sums too. There's lots more addition practice up to 10 in this set of 4 worksheets.