Part 1: Review the Ten and another strategy from lesson 4 and 5. Since one of the addends in problem is a 10, notice how you do not have to count one by one to find the sum. Part 2: In the problem 9 + 4, we do not have a ten to help us. If you have not memorized this fact yet, do not start counting one by one on your fingers. Instead, use the Make a Ten strategy, and you will see the answer without having to count one by one.
- Step 1. Look at the problem 9 + 4. Notice that the top frame with 9 counters only needs one more counter to make a ten.
- Step 2. Cross out the last counter from the bottom frame and move it up into the empty space in the top frame. Now that you have made a ten, it’s easy to visualize the answer.