
Desafios matemáticos
Authored by SINVAL NETO
Mathematics
9th Grade
CCSS covered

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57 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Resolva a equação: 2x + 5 = 17
x = 5
x = 6
x = 7
x = 12
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Qual é 25% de 320?
64
80
72
100
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Se 5 cadernos custam R$ 30,00, quanto custarão 8 cadernos, mantendo a proporção?
R$ 36,00
R$ 42,00
R$ 48,00
R$ 54,00
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Calcule: -7 + 12 - 5
0
2
5
-2
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Resolva a equação: 4x - 8 = 20
x = 6
x = 7
x = 8
x = 9
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Em um gráfico de pizza, 30% dos alunos preferem matemática. Se há 120 alunos, quantos preferem matemática?
24
30
36
40
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Se 3 metros de tecido custam R$ 45,00, quanto custam 7 metros?
R$ 95,00
R$ 105,00
R$ 90,00
R$ 120,00
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