the.com/addition
The art of making one number friendlier by inviting more numbers over.
means The arithmetic operation that combines two or more quantities into a single total sum.
from From Latin additio, meaning a putting-to, from addere — to give or add to, where ad means toward and dare means to give.
Commutes freelyOrder never changes the answer.
Identity elementAdd zero, change nothing.
Oldest operationPredates written language as tally marks.