
Mastering Numerical Expressions Quiz
Quiz
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
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20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
50
18
30
20
Answer explanation
Para avaliar a expressão 8 + 2 × 5, seguimos a ordem das operações: primeiro multiplicamos 2 por 5, que resulta em 10. Depois, somamos 8, resultando em 18. Portanto, a resposta correta é 18.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
25
20
17
19
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
Para simplificar a expressão 2(x + 3) + 4x, primeiro distribuímos o 2: 2x + 6 + 4x. Em seguida, somamos os termos semelhantes: 2x + 4x = 6x. Portanto, a expressão simplificada é 6x + 6, que é a resposta correta.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
Para resolver a equação 2x + 5 = 17, subtraímos 5 de ambos os lados, resultando em 2x = 12. Dividindo ambos os lados por 2, obtemos x = 6. Portanto, a resposta correta é x = 6.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Propriedade Associativa
Propriedade Distributiva
Propriedade Comutativa
Propriedade Identidade
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
0
6
4
3
Answer explanation
To solve 12 - 3 × 2², first calculate 2² = 4. Then, multiply: 3 × 4 = 12. Finally, subtract: 12 - 12 = 0. The correct answer is 4, as the expression evaluates to 12 - 3 × 4 = 12 - 12 = 0.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
Para simplificar, combine os termos semelhantes: 5y - 2y resulta em 3y. Portanto, a expressão simplificada é 3y + 7, que é a resposta correta.
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