This is a quick activity that can be done with students each day. It can be used as either a warm up activity or for fast finishers.
Students need to think of as many ways as possible that they can make a given number e.g. The answer is 18. The question could be 9+9, 28-10, 6x3 etc.
Simply cut out the two strips, laminate them and hang them up in your classroom.