
Desafio de Matemática do 7º e 9° Ano- Simulado
Authored by ROSELI FREITAS
Mathematics
6th Grade
Used 12+ times

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31 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Answer explanation
Para somar as frações \(\frac{1}{4} + \frac{2}{4}\), mantemos o denominador comum (4) e somamos os numeradores: \(1 + 2 = 3\). Assim, obtemos \(\frac{3}{4}\), que é a resposta correta.
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Calcule o perímetro de um triângulo com lados de 5 cm, 7 cm e 9 cm.
20 cm
21 cm
22 cm
23 cm
Answer explanation
Para calcular o perímetro de um triângulo, somamos os comprimentos dos lados: 5 cm + 7 cm + 9 cm = 21 cm. Portanto, a resposta correta é 21 cm.
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Qual dos ângulos abaixo é um ângulo agudo?
90°
120°
45°
180°
Answer explanation
Um ângulo agudo é aquele que mede menos de 90°. Entre as opções, 45° é o único ângulo que se encaixa nessa definição, pois é menor que 90°, enquanto 90°, 120° e 180° são ângulos retos ou obtusos.
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Um gráfico de barras mostra que 10 alunos preferem maçãs, 15 preferem bananas e 5 preferem laranjas. Quantos alunos foram entrevistados no total?
25
30
20
15
Answer explanation
Para encontrar o total de alunos entrevistados, somamos as preferências: 10 (maçãs) + 15 (bananas) + 5 (laranjas) = 30 alunos. Portanto, a resposta correta é 30.
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
5,2
6,1
6,2
6,3
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Converta 1500 milímetros para metros.
1,5 m
15 m
150 m
0,15 m
Answer explanation
Para converter milímetros para metros, dividimos por 1000. Assim, 1500 mm ÷ 1000 = 1,5 m. Portanto, a resposta correta é 1,5 m.
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Answer explanation
Para subtrair as frações, mantemos o denominador e subtraímos os numeradores: \(\frac{5}{6} - \frac{1}{6} = \frac{5-1}{6} = \frac{4}{6}\). Portanto, a resposta correta é \(\frac{4}{6}\).
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