Matematica - Ensino Fundamental

Exercıcios - Lista 1 - 2013 - 8o. Ano1

Numeros Irracionais, Conjuntos Numericos

1- Assinale com um X os numeros irracionais:

a) � 1, 1 f) � 0, 777 . . .

b) � − 4 g) � 2 + 0, 777 . . .

c) � 2√

4 h) � 3√

7

d) � 3, 9876543210987 . . . i) � 3, 14

e) � 0, 5222 . . . j) � 2 2√

2

2- Assinale com um X o diagrama de Venn correto:

a) � b) �

c) � d) �

e) �

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3- Assinale se as frases abaixo sao verdadeiras (V) ou falsas (F):

a - ( ) Nem todo numero inteiro e natural.

b- ( ) Nem todo numero irracional e real.

c- ( ) O numero 0 nao e natural.

d- ( ) O numero −1 e real, racional e inteiro.

e- ( ) Numeros inteiros podem ser irracionais.

f- ( ) Todo numero inteiro e real e racional.

g- ( ) Nem toda dızima periodica e racional.

h- ( ) O numero 3√

8 e irracional.

i- ( ) O numero 12

e racional.

j- ( ) Nem todo numero que pode ser escrito em forma de fracao e racional.

k- ( ) O numero −1, 111 e irracional.

l- ( ) O numero 3, 121212 . . . e racional.

m- ( ) Todo numero natural e racional e real.

n- ( ) Todo numero inteiro e racional e real.

4- Desenhe o diagrama de Venn. Dados os numeros abaixo, escreva-os dentrodas regioes correspondentes no diagrama de Venn.

−0, 5 2√

2 2√

4 − 2√

4 −9999 1, 9797 . . . 1, 987 2√

3 0

2

Respostas:

1) h.

2) c.

3) a) V; b) F; c) F; d) V; e) F; f) V; g) F; h) F; i) V; j) F; k) F; l) V; m) V; n) V.

4)

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c©2013 Christine Cordula Dantas

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Author’s Affiliation and Contact Information:

Materials Division (AMR-C)Institute of Aeronautics and Space (IAE)Department of Science and Aerospace Technology (DCTA)Pca. Mal. Eduardo Gomes, 50Vila das AcaciasSao Jose dos Campos - SPCEP 12.228-904Brazil

E-mails: christineccd@iae.cta.br; ccordulad@gmail.com

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