Komutatifitas miwah asosiatifitas saking penjumlahan asli maciri langsung; negesang wilangan asli 0 pinaka himpunan rasional negatif, ketah kacingak dados identitas aditif.
The commutativity and associativity of real addition are immediate; defining the real number 0 to be the set of negative rationals, it is easily seen to be the additive identity.