There are 10 gum balls in a jar. 5 of them disappear. How many are left?
There are 7 pencils on the table. 3 of them disappear. How many are left?
NOTE: Read these problems with the student. Have the student answer the problems. Make up a few more problems like these and have the student answer each problem. You may need to help the student read the problems in the activity part of this lesson.