Ways to make numbers adding and subtraction quiz. This is an activity in which students will review how numbers could be formed by either adding or subtracting. It is a matching exercise containing a shuffled puzzle. Find the combination that makes a number and match it to the number by dragging and dropping. This activity is for 2nd, 3rd, 4th, 5th grade students. Review while at home or in school and keep trying until you have a good score.