Autor: Vencer, Vencer, Vencer... | Publicado: 2016-06-30T10:25:00-07:00


EXERCÍCIOS &nbsp;– MATEMÁTICA – 7º ANO&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;

1 - Diariamente,
muitos jornais publicam informações relacionadas ao tempo, como temperaturas,
ventos, fusos horários, Lua, qualidade do ar, qualidade das praias...&nbsp; Veja os dados divulgados pela Folha de São
Paulo a respeito do tempo em algumas cidades do mundo, no dia 5 de janeiro de
2000:

 

  
  


Cidades



  
  
Fuso

  
  


Temperatura

 

  
  


Mínima

  
  


Máxima

 

  
  
Assunção

  
  
– 1 h

  
  
22

  
  
38

 

  
  
Chicago

  
  
– 4 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 3

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  3

 

  
  
Genebra

  
  
+ 3 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 2

  
  
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6

 

  
  
Havana

  
  
– 3 h

  
  
18

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  29

 

  
  
Madri

  
  
+ 3 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 1

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  8

 

  
  
Montreal

  
  
– 3 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 6

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  3

 

  
  
Moscou

  
  
+ 5 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 9

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 7

 

  
  
Nova Delhi

  
  
+ 7 h 30 min

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  6

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  19

 

  
  
Roma

  
  
+ 3 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 2

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  14

 

  
  
São Paulo

  
  
&nbsp;&nbsp; 0

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  18

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  24

 

  
  
Seul

  
  
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+ 11 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 4

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  4

 

  
  
Viena

  
  
+ 3 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 8

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  2

 

  
  
Zurique

  
  
+ 3 h

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  – 2

  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  3

 




Fonte: Folha de São
Paulo, 5 de janeiro.&nbsp; Caderno Campinas.

Observação: O fuso
horário representa a diferença entre o horário da cidade e o de Brasília.



Qual das cidades da
tabela acima registrou a menor temperatura mínima?&nbsp; E a maior? 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 





2 - Coloque em ordem crescente as temperaturas máximas da tabela acima.

-7,
2, 3, 4, 6, 14, 19, 24, 29, 38







3 - Calcule:&nbsp;
+ 475º – 150º – 180º – 180º – 220º – 230º&nbsp; =





4 - Calcule:&nbsp;
– 220º – ( – 230º ) =





5 - Dona Vera sempre
faz compras no armazém “Bom e Barato”. Seu José, dono do armazém, marca tudo
num caderno. Ele marcou os créditos com o sinal + e as dívidas com o sinal –.



<!--[if !supportLists]-->a)&nbsp;&nbsp;
<!--[endif]-->Observe
o que aconteceu num certo mês e registre como você imagina que seu José fez
suas anotações:



<!--[if !supportLists]-->-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<!--[endif]-->Ela
fez uma compra de 18 reais e não pagou.&nbsp; 

<!--[if !supportLists]-->-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<!--[endif]-->Ela
fez uma compra de 10 reais e também não pagou.&nbsp;


<!--[if !supportLists]-->-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<!--[endif]-->Ela
foi ao armazém e pagou 20 reais ao seu José.&nbsp;




Dona Vera tem crédito ou dívida com o seu
José? De que valor?



b)No mês seguinte a esse, em 14 dias, dona
Vera fez outras compras:



<!--[if !supportLists]-->-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<!--[endif]-->Ela
fez uma compra de 30 reais e não pagou. Seu José não se esqueceu da situação de
dona Vera no final do mês anterior e registrou tudo. Como ficou esse
registro?&nbsp; 

<!--[if !supportLists]-->-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<!--[endif]-->Ela
fez uma compra de 15 reais e pagou 40 reais. Como foi registrado?

<!--[if !supportLists]-->-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<!--[endif]-->Ela
foi ao armazém e pagou 20 reais para o seu José. 



E
agora, dona Vera tem crédito ou dívida com o seu José? De que valor?



6 - Um mergulhador
saltou de um ponto situado 6m acima do nível do mar e desceu 20m a partir do
ponto inicial.

<!--[if !supportLists]-->a)&nbsp;&nbsp;
<!--[endif]-->Use
um número inteiro positivo ou um número inteiro negativo para indicar a posição
onde ele se encontra em relação ao nível do mar. 

<!--[if !supportLists]-->b)&nbsp;&nbsp;
<!--[endif]-->Do
ponto onde estava ele desceu, ainda, 5m. A que posição chegou em relação ao
nível do mar?&nbsp; 







7 - Complete as
sentenças, a fim de obter sentenças verdadeiras:



<!--[if !supportLists]-->a)&nbsp;&nbsp;
<!--[endif]-->–
1 e +1 são números inteiros ________________

<!--[if !supportLists]-->b)&nbsp;&nbsp;
<!--[endif]-->7
e -7 também são números inteiros _______________.

<!--[if !supportLists]-->c)&nbsp;&nbsp;
<!--[endif]-->O
simétrico de 30 é ________.

<!--[if !supportLists]-->d)&nbsp;&nbsp;
<!--[endif]-->O
oposto de – 30 é ________.





8 - Complete com os
símbolos &lt; , &gt; ou&nbsp; = :



a)&nbsp;&nbsp;&nbsp; 0 __&nbsp;
1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) 17 __&nbsp;
– 17&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c)&nbsp; – 20 __&nbsp;
– 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d)&nbsp;&nbsp; – 3 __&nbsp; 6 

e)
– 8 __&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; f)&nbsp;&nbsp; 0 &nbsp;__&nbsp;
– 50&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; g) – 14 &nbsp;__&nbsp; – 61&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; h) – 26 __ – 95&nbsp;&nbsp;&nbsp; 



&nbsp;&nbsp;

19 - Calcule o valor
de:



 

  
  
<!--[if !supportLists]-->a)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->3 + 2 – 4 = 



<!--[if !supportLists]-->b)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->12 + 5 – 8 =



<!--[if !supportLists]-->c)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->7 – 3 + 5 = 



<!--[if !supportLists]-->d)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->8 – 1 + 2 = 



<!--[if !supportLists]-->e)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->– 3 + 5 – 2 – 9 = 



<!--[if !supportLists]-->f)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  <!--[endif]-->7 + 8 – 6 – 4 – 3 =



<!--[if !supportLists]-->g)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->– 5 + 4 – 2 – 7 + 3 = 



<!--[if !supportLists]-->h)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->23 – 45 – 12 + 67 = 



<!--[if !supportLists]-->i)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  <!--[endif]-->72 – 24 – 56 + 13 = 



<!--[if !supportLists]-->j)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  <!--[endif]-->68 – 34 – 54 + 43 = 



<!--[if !supportLists]-->k)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->– 27 – 35 – 68 – 98 = 



<!--[if !supportLists]-->l)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  <!--[endif]-->48 + 25 + 79 – 99 = 



<!--[if !supportLists]-->m)&nbsp;&nbsp;
  <!--[endif]-->59 – 43 – 76 + 24 = 



  
  
<!--[if !supportLists]-->n)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->86 – 64 – 78 + 28 = 



<!--[if !supportLists]-->o)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->68 – 65 – 89 – 24 = 



<!--[if !supportLists]-->p)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->– 46 + 25 – 135 + 47 = 



<!--[if !supportLists]-->q)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->90 – 40 – 37 + 62 = 



<!--[if !supportLists]-->r)&nbsp;&nbsp;&nbsp;&nbsp;
  <!--[endif]-->73 – 87 – 98 + 97 = 



<!--[if !supportLists]-->s)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->27 – 74 – 31 + 38 = 



<!--[if !supportLists]-->t)&nbsp;&nbsp;&nbsp;&nbsp;
  <!--[endif]-->88 + 54 + 99 – 43 = 



<!--[if !supportLists]-->u)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->87 – 54 – 34 + 33 = 



<!--[if !supportLists]-->v)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->–20 + 30 + 20 – 30 =



<!--[if !supportLists]-->w)&nbsp;&nbsp;
  <!--[endif]-->–13 + 46 + 13 – 46 =



<!--[if !supportLists]-->x)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->98 – 65 – 87 + 95 = 



<!--[if !supportLists]-->y)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->77 – 66 + 22 + 55 = 



<!--[if !supportLists]-->z)&nbsp;&nbsp;&nbsp;
  <!--[endif]-->127 – 67 + 86 – 34 =

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

 








10 - Calcule:



<!--[if !supportLists]-->a.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
+ 10 ).( – 12 ).( + 1 ).( – 3 ).( + 2 )&nbsp; = 

<!--[if !supportLists]-->b.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
– 3 ).( - 2 ).( – 1 0).( + 4 )&nbsp;
=

<!--[if !supportLists]-->c.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
– 2 ).( – 2 ).( – 2 ).( – 2 )&nbsp; =

<!--[if !supportLists]-->d.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
+ 3 ).( + 3 ).( - 3 ).( - 3 )&nbsp; =

<!--[if !supportLists]-->e.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
- 1 ) . ( -12 ) . ( + 57 ) = 



11- Efetue:



<!--[if !supportLists]-->a.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
– 12 ) : ( – 3 )&nbsp; = 

<!--[if !supportLists]-->b.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
– 48 ) : ( + 6 )&nbsp; = 

<!--[if !supportLists]-->c.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
+ 32 ) : ( +-16 )&nbsp; =&nbsp; 

<!--[if !supportLists]-->d.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
+ 40 ) : ( – 1 )&nbsp; = 

<!--[if !supportLists]-->e.&nbsp;&nbsp;&nbsp;
<!--[endif]-->(
- 42 ) : ( + 6 ) =&nbsp;