From the standpoint of calculation, they're as easy to understand as one plus one, which is two. Then one plus two is three, two plus three is five, three plus five is eight, and so on.
Din punct de vedere al calculelor sunt ușor de înțeles: 1 + 1 = 2 Apoi, 1 + 2 = 3 ; 2 + 3 = 5 ; 3 + 5 = 8 ș.a.m.d.