Subtraction Principle Worksheets

What is the Subtraction Principle? There is more than one way to count anything. The world of mathematics teaches us that there are different ways to resolve different problems. Thus, one of those profound counting methods is the subtraction principle. The subtraction principle states that if you have a subset A from a universal set U, then according to the principle, A = U – A. Let's take a real-world example, and you want to find the number of action figures you have from your set of 50 toys. Now, you know that you don't like other toys, so you decided to count them instead. You learned that you have around 13 toys that are not action figures. Now, you can just subtract these toys from your total number of toys, i.e., 50 -13 = 37. There you go, you now know that you have 37 action figures with you.

A Non-math equation, interpreted by a mathematician:

"What is born must eventually die."
"What is sold by someone is bought by another."
Patricia Clark Kenschaft, Math Power