Autor: Professores de matemática | Publicado: 2012-07-03T15:50:00-07:00

Pessoal, boas férias, e divirtam-se com os exercícios abaixo:

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1) Bruno
conheceu&nbsp; um aviário que tem de 950 aves,
e identificou que existem 16% de patos. Qual é o número de patos deste aviário?


2)&nbsp;Das 10 moedas que Danilo possui em seu bolso apenas 20% delas
são moedas de um real, as demais são de 10 centavos. Quantas moedas de um real
ele possui no bolso? Qual o valor total que Danilo tem no bolso?

3) Dos 34 colegas que Débora possui na classe, 50% são mulheres. Quantos
colegas são meninos?

4) Eduardo vai passar férias na praia, e ele sabe que
30% da população desta cidade litorânea mora na área insular e os demais
456.000 habitantes moram na área continental. Quantas pessoas moram na ilha? 

5) Emily pensou em um número e disse que 8% deste número é igual a 20,
quanto é 30% deste número?

6) Evellyn trabalhou em um buffet de festa por dois meses e ganhou
R$&nbsp;800,00 por serviços que fez, mas teve um desconto total de
R$&nbsp;240,00. Este desconto equivale a quantos por cento do que ganhou?

7) Se uma colega de Fabrícia tem 12 anos, e o irmão desta colega tem 20
anos. A idade dela é quantos por cento da dele?

8) Das 56 balas que Gabriela tinha, ela já comeu 75%. Quantas balas
ainda restam?

9) A moto do pai de Genefer alcança uma velocidade máxima de 160 km/h, e
um&nbsp; carro atinge até 200 km/h. A
velocidade máxima do carro é quantos por cento da velocidade máxima da moto do
pai de Genefer?

10) O pai de George comprou uma moto e pagou à vista R$&nbsp;3360,00 do
valor total de R$&nbsp;12000,00. Quantos por cento ele pagou da moto?

11)&nbsp;A mãe da Hellen comprou uma TV que custava R$&nbsp;1.500,00
obteve um desconto de 12%. Por quanto acabou pagando a TV? Qual o valor do
desconto obtido?

12) Iasmim esbarrou em
uma mesa que tinha 60 garrafas de refrigerante, a maioria das garrafas quebrou,
mas sobraram 15% das garrafas. Quantas garrafas sobraram e quantas foram
quebradas? Se cada garrafa custa R$ 0,20, quanto que Iasmim teve que pagar?

13) &nbsp;A mãe de Isabella comprou 30 camisetas para
revender. E ela conseguiu vender 60%. Quantas camisetas ela vendeu? 

14) João Victor pergunta: quanto é 70% de 150% de 80%?

15)&nbsp;José Pedro calculou 45% de 90% de 3600, e
disse que o resultado é menor que 1460, ele está certo? Por quê ? 

16) Leidiane comprou um frango super congelado que tinha peso de 3,300
Kg,&nbsp; como sua mãe ia fazer naquele dia
deixou fora da geladeira, e após descongelar completamente o frango

foi pesado ( sem a água degelada ) e deu 2970 g , quanto que o gelo
pesava? Qual o percentual de peso desta água em relação ao frango?

17) A mãe de Luana comprou um guarda-roupa novo, à prazo, deu 20% de
entrada e pagou 4 prestações de R$ 200,00. Quanto pagou pelo móvel?

18) Luccas comprou um refrigerante e um salgadinho, gastou 30% do que
tinha, sobrou R$ 14,00. Quanto Luccas tinha de dinheiro?