Addition - A mathematical operation that represents combining objects t into a larger collection. It is signified by the plus sign (+).
Subtraction - A mathematical operation that represents process of finding the difference between numbers or quantities. It is signified by the minus sign (-).
A general example to help you recognize patterns and spot the information you're looking for
Addition $$1 + 8 = 9$$ $$120 + 6480 = 6600$$ Subtraction $$10 - 2 = 8$$ $$2000 - 1 = 1999$$
We use these operations every day.