There are 7 goats in a barn. 6 more goats join them. How many goats in all are in the barn? Fill in the blank with the number of goats in the barn in all.
There are _______ goats in the barn, in all.
*To fill in the blank, click on the blue box and type the number that is the answer (sum) to the expression.
Click on "show your work" to use the number line or tens frames as a tool to show the addition using the pencil tool.