
Operações Matemáticas
Mathematics
9th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Calcule a soma das frações 1/3 e 2/5.
11/15
7/10
5/8
3/7
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Subtraia a fração 3/4 da fração 5/8.
-1/2
1/8
-1/8
2/3
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Determine o resultado da equação incompleta do segundo grau x^2 + 5x = 0.
x = 0, x = -5
x = 0, x = 1
x = 2, x = -3
x = 5, x = -5
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Resolva a equação incompleta do segundo grau 2x^2 - 10x = 0 por fatoração.
x = 0, x = 5
x = 2, x = 3
x = 1, x = 4
x = -5, x = 0
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Encontre as raízes da equação do segundo grau x^2 - 4x + 4 = 0 utilizando a fórmula de Bhaskara.
x = 3
x = 1
x = -2
x = 2
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Calcule as soluções da equação do segundo grau 3x^2 + 7x - 6 = 0 por Bhaskara.
x1 = 1, x2 = -3/2
x1 = 4, x2 = -5
x1 = 0, x2 = -6
x1 = 2, x2 = -3
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Simplifique a expressão (2/3) * (5/4).
3/5
1/2
5/6
7/8
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