Atividade para avaliação do 7º Ano 2015
Autor: ADELSONMB | Publicado: 2015-11-24T12:02:00-08:00

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Avaliação de Matemática



1)(Unip-SP) O valor da expressão numérica -4² + (3
- 5) . (-2)³ + 3² - (-2)4&nbsp;é:
a) 7
b) 8
c) -7
d) 15

2) Se você pudesse enfileirar átomos de hidrogênio,
seriam necessários cerca de 20 bilhões de átomos para formar uma fila de 2
metros. O número 20 bilhões expresso em notação científica é igual a:
a) 2 . 109
b) 2 . 1012
c) 2 . 1010
d) 2 . 10-10



3) Manuel
deu, a cada um dos seus 6 amigos, 6 pacotes de 6 figurinhas cada. Quantas
figurinhas ele deu, no total?

a) 18&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

b) 36

c) 42

d) 216

4)Qual é o valor da expressão x + y – z sabendo que x = - , y = +2,5 e z = -3,2?





5)Transforme em uma única potência.

&nbsp;a) 102 . 22&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b)
(- 6)3 . (- 8)3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c) ()4 . ( &nbsp;)4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d) 42 . 43
. 44 . 4



6) Escreva os números seguintes como
potência de base 10.

a) 10000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) 0,01&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c) 0,0000001&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d) 









7)Determine o valor de cada expressão.

a) 2 . &nbsp;– 5 . &nbsp;+ (- 3) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b)
( - 3) . (+ 1,25) – (+ 1,2) : (- 0,6)