Penambahan: Perbedaan antara revisi

[[Berkas:Addition01.svg|right|thumb|120px|3 + 2 = 5 dengan [[apel]] pilihan paling populer dalam buku cetak<ref>From Enderton (p.138): "...select two sets ''K'' and ''L'' with card ''K'' = 2 and card ''L'' = 3. Sets of fingers are handy; sets of apples are preferred by textbooks."</ref>]]

 

== Sifat-sifat ==