These dot cards are great for both addition and subtraction. They are arranged by addition and subtraction strategies. For addition, they repesent to make 10 strategy, doubles, near doubles, and counting on. For subtraction, they represent decomposed 10, halves, near halves, and counting back.
To use for subtraction, using think addition cut the cards out and fold over the flap. Then say we have a total of 13 dots. You see 8 dots,how many are missing
To use for addition, you can cover up the number at the bottom and say how many donuts do you see altogether?