Regra de três
Authored by Kadu Picaza
Mathematics
7th Grade
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20 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Se 5 litros de álcool custam R$20,00, quanto custarão 12 litros desse combustível no mesmo posto de abastecimento?
Answer explanation
Explanation of direct proportion calculation for question 1.
2.
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1 min • 1 pt
Um grupo de 15 operários constrói uma piscina em 16 dias. De quantos dias precisarão 12 operários para construir a mesma piscina?
Answer explanation
Explanation of direct proportion calculation for question 2.
3.
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1 min • 1 pt
Uma torneira goteja 9 vezes a cada 15 segundos. Qual a quantidade de água em mililitros que vaza por hora, considerando cada gota igual a 0,5 ml?
Answer explanation
Explanation of direct proportion calculation for question 3.
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Em uma fábrica com 32 mil funcionários, o índice de produtividade era de 9 veículos por funcionário. Em 2008, com 12 veículos por funcionário, foram produzidos 126 mil veículos a mais. Quantos funcionários estavam empregados em 2008?
Answer explanation
Explanation of direct proportion calculation for question 4.
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
No ano passado, 60 pessoas terminaram um mutirão de limpeza em 7 horas. Este ano, 105 voluntários se apresentaram. Em quantas horas poderão completar o serviço?
Answer explanation
Explanation of direct proportion calculation for question 5.
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Um ciclista percorreu 60 km em 9 horas. Ele pedalou 20 km nas duas primeiras horas e o restante a velocidade constante. Qual foi essa velocidade aproximadamente ?
Answer explanation
Explanation of direct proportion calculation for question 6.
7.
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1 min • 1 pt
Uma máquina imprime 300 cópias em 5 minutos. Quantas cópias serão impressas em 20 minutos?
Answer explanation
Explanation of direct proportion calculation for question 7.
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