Subtraction is a mathematical operation to determine the remaining quantity when some amount is taken away. For example, if you have a pack of six beers, and consume two, you are left with four beers.
Negative numbers Edit
Negative numbers do not exist. If you ever see a problem similar to "If Johnny has 5 apples and you take away 8 of them, how many are left?", you've been asked a trick question as part of conservative deceit.
Can you imagine what it’s like to be dying in some dirty place with cockroaches biting you while you are still alive? I can’t -- though Scientologists let Lisa McPherson die that way. If you’ve the stomach for them here’s the Autopsy photos.