
Razões e Proporções
Authored by ERILÂNDIA PAULA
Mathematics
1st Grade

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Uma razão pode ser definida como a comparação entre duas grandezas. Se a e b são grandezas, sendo b diferente de 0, então a divisão a/b ou a:b é uma razão. São exemplos de razões que utilizamos, EXCETO:
Velocidade média
Densidade
Pressão
Temperatura
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Um concurso para preencher 200 vagas recebeu 1600 inscrições. Quantos candidatos há para cada vaga?
4
6
8
12
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Gustavo estava treinando pênaltis caso precisasse na final dos jogos de futebol escolares. Sabendo que de 14 chutes ao gol ele acertou 6, qual a razão do número de acertos para o total de chutes?
3/5
3/7
7/3
5/3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Determine o valor de x nas proporções a seguir.
2/6 = 9/x
1/3 = x/12
x/10 = 6/5
8/x = 2/15
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a selection, the ratio between the number of male and female candidates for a position is 4/7. Knowing that 32 candidates are male, the total number of participants in the selection is:
56
72
88
94
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a model of a condominium, one of its buildings, 80 meters high, is only 48 centimeters. The height of another building of 110 meters in this model, maintaining the proper proportions, in centimeters, will be:
56
60
66
72
78
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The ratio between a person's weight on Earth and their weight on Neptune is 5/7. Thus, the weight of a person who weighs 60 kg on Earth, on Neptune, is in the range
[40 kg; 45 kg]
[45 kg; 50 kg]
[55 kg; 60 kg]
[75 kg; 80 kg]
[80 kg; 85 kg]
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