
Revisão básica 8º ano
Authored by Kelen Moraes
Mathematics
8th Grade
Used 6+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
O perímetro de um retângulo é calculado usando a fórmula:
P = 2b + 2h
Substituindo as letras com os valores indicados, marque a alternativa que mostra o perímetro do retângulo
que possui 15 cm de base e 8 cm de altura:
12,0 cm²
120 cm²
12 m²
120 m²
2.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
O valor numérico da expressão 2.x + m, para x= -1 e m= -3 é:
+5
-8
+8
-5
3.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Carlos é gerente de uma loja de jogos. Para calcular seu lucro em cada jogo, em reais, cada jogo que vende, é usada a seguinte fórmula: P = 3 J + 3,9 sendo P o preço a ser vendido, J o preço real do produto antes da venda. Considere que o preço de um jogo X seja de R$ 4,50. Então, ele vende esse jogo por:
R$ 17,40
R$ 13,50
R$ 17,50
R$ 13,40
4.
MULTIPLE CHOICE QUESTION
5 mins • 3 pts
Uma pessoa aplica R$18.000,00 à taxa de 1,5% ao mês durante 8 meses. O valor acumulado ao final deste período é de:
R$ 2160,00
R$ 2156,00
R$ 1160,00
R$ 1156,00
5.
MULTIPLE CHOICE QUESTION
5 mins • 4 pts
Quanto renderá um capital de R$ 60.000,00 aplicado à taxa de 24% a.a, durante sete meses?
R$ 10.080,00
R$ 8450,00
R$ 10.180,00
R$ 8400,00
6.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
O valor numérico da expressão algébrica x² + x.y + y² quando x = -0,8 e y = 0,2 será:
-1,20
-0,84
+1,20
+0,84
7.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Aplicando as propriedades da potenciação, marque a alternativa correta para:
5² : 5²
5¹
50
54
5²
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