55 (عدد)

55 (خمسة وخمسون) هو عدد صحيح  says: "ℕ is the set of natural numbers (positive integers)" (p. 3) include zero in the natural numbers: "Intuitively, the set  of all "natural numbers" may be described as follows:  contains an "initial" number 0; ...". They follow that with their version of the Peano Postulates. (p. 15) يلي العدد 54 ويسبق العدد 56 وهو عدد طبيعي موجب.
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تصنيف:أعداد صحيحة