#2. There are 10 tally marks for recess, and 7 for gym. Add 10 and 7 to get 17 friends.
#3. Corey sorts out his flowers. How many flowers did Corey sort?
#4. He has 16 friends. We are going to subtract the total amount of friends from responded friends. There are 6 friends coming, and 3 who are not, which is a total of 9. Subtract 9 from 16 to get 7. You can write this as 16-9=7