# Matemática elementar/Conjuntos/Números racionais/Exercícios

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Ver capítulo Matemática elementar/Conjuntos/Números racionais

Os conjuntos ${\displaystyle \mathbb {N} \,}$, ${\displaystyle \mathbb {Z} \,}$, ${\displaystyle \mathbb {Q} \,}$ e seus principais subconjuntos.

1 ${\displaystyle 2\in \mathbb {N} \,}$

2 ${\displaystyle {\frac {1}{3}}\in \mathbb {N} \,}$

3 ${\displaystyle 0\in \mathbb {N} \,}$

4 ${\displaystyle -5\in \mathbb {N} \,}$

5 ${\displaystyle -{\frac {2}{5}}\in \mathbb {N} \,}$

6 ${\displaystyle 2\in \mathbb {N} ^{*}\,}$

7 ${\displaystyle {\frac {1}{3}}\in \mathbb {N} ^{*}\,}$

8 ${\displaystyle 0\in \mathbb {N} ^{*}\,}$

9 ${\displaystyle -5\in \mathbb {N} ^{*}\,}$

10 ${\displaystyle -{\frac {2}{5}}\in \mathbb {N} ^{*}\,}$

11 ${\displaystyle 2\in \mathbb {Z} \,}$

12 ${\displaystyle {\frac {1}{3}}\in \mathbb {Z} \,}$

13 ${\displaystyle 0\in \mathbb {Z} \,}$

14 ${\displaystyle -5\in \mathbb {Z} \,}$

15 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Z} \,}$

16 ${\displaystyle 2\in \mathbb {Z} ^{*}\,}$

17 ${\displaystyle {\frac {1}{3}}\in \mathbb {Z} ^{*}\,}$

18 ${\displaystyle 0\in \mathbb {Z} ^{*}\,}$

19 ${\displaystyle -5\in \mathbb {Z} ^{*}\,}$

20 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Z} ^{*}\,}$

21 ${\displaystyle 2\in \mathbb {Z} _{+}\,}$

22 ${\displaystyle {\frac {1}{3}}\in \mathbb {Z} _{+}\,}$

23 ${\displaystyle 0\in \mathbb {Z} _{+}\,}$

24 ${\displaystyle -5\in \mathbb {Z} _{+}\,}$

25 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Z} _{+}\,}$

26 ${\displaystyle 2\in \mathbb {Z} _{+}^{*}\,}$

27 ${\displaystyle {\frac {1}{3}}\in \mathbb {Z} _{+}^{*}\,}$

28 ${\displaystyle 0\in \mathbb {Z} _{+}^{*}\,}$

29 ${\displaystyle -5\in \mathbb {Z} _{+}^{*}\,}$

30 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Z} _{+}^{*}\,}$

31 ${\displaystyle 2\in \mathbb {Z} _{-}\,}$

32 ${\displaystyle {\frac {1}{3}}\in \mathbb {Z} _{-}\,}$

33 ${\displaystyle 0\in \mathbb {Z} _{-}\,}$

34 ${\displaystyle -5\in \mathbb {Z} _{-}\,}$

35 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Z} _{-}\,}$

36 ${\displaystyle 2\in \mathbb {Z} _{-}^{*}\,}$

37 ${\displaystyle {\frac {1}{3}}\in \mathbb {Z} _{-}^{*}\,}$

38 ${\displaystyle 0\in \mathbb {Z} _{-}^{*}\,}$

39 ${\displaystyle -5\in \mathbb {Z} _{-}^{*}\,}$

40 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Z} _{-}^{*}\,}$

41 ${\displaystyle 2\in \mathbb {Q} \,}$

42 ${\displaystyle {\frac {1}{3}}\in \mathbb {Q} \,}$

43 ${\displaystyle 0\in \mathbb {Q} \,}$

44 ${\displaystyle -5\in \mathbb {Q} \,}$

45 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Q} \,}$

46 ${\displaystyle 2\in \mathbb {Q} ^{*}\,}$

47 ${\displaystyle {\frac {1}{3}}\in \mathbb {Q} ^{*}\,}$

48 ${\displaystyle 0\in \mathbb {Q} ^{*}\,}$

49 ${\displaystyle -5\in \mathbb {Q} ^{*}\,}$

50 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Q} ^{*}\,}$

51 ${\displaystyle 2\in \mathbb {Q} _{+}\,}$

52 ${\displaystyle {\frac {1}{3}}\in \mathbb {Q} _{+}\,}$

53 ${\displaystyle 0\in \mathbb {Q} _{+}\,}$

54 ${\displaystyle -5\in \mathbb {Q} _{+}\,}$

55 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Q} _{+}\,}$

56 ${\displaystyle 2\in \mathbb {Q} _{+}^{*}\,}$

57 ${\displaystyle {\frac {1}{3}}\in \mathbb {Q} _{+}^{*}\,}$

58 ${\displaystyle 0\in \mathbb {Q} _{+}^{*}\,}$

59 ${\displaystyle -5\in \mathbb {Q} _{+}^{*}\,}$

60 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Q} _{+}^{*}\,}$

61 ${\displaystyle 2\in \mathbb {Q} _{-}\,}$

62 ${\displaystyle {\frac {1}{3}}\in \mathbb {Q} _{-}\,}$

63 ${\displaystyle 0\in \mathbb {Q} _{-}\,}$

64 ${\displaystyle -5\in \mathbb {Q} _{-}\,}$

65 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Q} _{-}\,}$

66 ${\displaystyle 2\in \mathbb {Q} _{-}^{*}\,}$

67 ${\displaystyle {\frac {1}{3}}\in \mathbb {Q} _{-}^{*}\,}$

68 ${\displaystyle 0\in \mathbb {Q} _{-}^{*}\,}$
69 ${\displaystyle -5\in \mathbb {Q} _{-}^{*}\,}$
70 ${\displaystyle -{\frac {2}{5}}\in \mathbb {Q} _{-}^{*}\,}$